The three bones of of bones three The

coast of , CNMI, where the now is absent (Becker (Becker absent is now species the where CNMI, Rota, of coast

cronesia. However, the only evidence of such is a report of the , Moorhen, of only such the is evidence of However, a Common cronesia. the report

hs sgiiatpeErpa lse fbrs lomgt ae curd n Mi­ in occurred have might also of losses pre-European significant Thus,

experienced numerous in prehistoric times as well (Steadman 1989). 1989). (Steadman well as times prehistoric in extinctions numerous experienced

Gallinula Gallinula chloropus,

Reichel Reichel

lynesian birds have been lost because of human impact during the past century century past the during impact human of because lost been have birds lynesian

(Engbring (Engbring

Micronesica Micronesica

ay niiul ouain ad nie pce o Mcoein n Po­ and Micronesian of species entire and populations individual Many

confined thus far to Rota, is much more limited than in . Polynesia. in than limited more much is Rota, to far thus confined

is true throughout , where the prehistoric record of birds, birds, of record prehistoric the where Micronesia, throughout true is

in the Mariana during the past few millennia. Probably the same same the Probably few past millennia. the during Islands Mariana the in

preliminary results from Rota indicate that great great losses occurred of that birds indicate Rota from results preliminary

needed to refine certain identifications and describe new species, the the species, new describe and identifications certain refine to needed

rot, Psittacidae new sp.; large parrotfinch, parrotfinch, large sp.; new Psittacidae rot,

named cave on Rota yielded a single bone of the Common Moorhen, Moorhen, Common the of bone single a yielded Rota on cave named

Anatidae new sp.; giant ground-dove, ground-dove, giant sp.; new Anatidae Gallinula Gallinula chloropus,

from the but still occur elsewhere in Micronesia. Four Four Micronesia. in elsewhere occur still but Islands Mariana the from

species are extinct and undescribed (a small, perhaps flightless duck, duck, flightless perhaps small, (a undescribed and extinct are species

cronesian Pigeon, Pigeon, cronesian

unknown on Rota but have been recorded on . Three species species Three Guam. on recorded been have but Rota on unknown

in the 19th or 20th century. Two others (White-browed Crake, Crake, (White-browed others Two century. 20th or 19th the in

(Blue-gray (Blue-gray Noddy,

limnas limnas cinereus;

laperouse; laperouse;

species are extinct or extirpated on Rota. Three of these (Audubon's (Audubon's these of Three Rota. on extirpated or extinct are species

Shearwater, Shearwater,

excavations in 1990 at a late Holocene bone deposit in Payapai Cave, Cave, Payapai in deposit bone Holocene late a 1990 at in excavations

Rota, Commonwealth of the . Twelve of Twelve these Islands. Mariana of Northern the Commonwealth Rota,

Abstract-Twenty-one Abstract-Twenty-one

ilgclSre, e Yr tt Msu, h tt Euain eatet Albany Department, Education State The Museum, State York New Survey, Biological

& &

Extinct Extinct and Extirpated Birds from Rota, Mariana Islands

25(1): 71-84 25(1):

& &

Glass 1991 ). Recent studies have shown that the Polynesian islands islands Polynesian the that shown have studies 1991 Recent Glass ).

Pratt 1985, King 1985, Pratt et al. 1987, Collar Collar 1987, al. et Pratt 1985, King 1985, Pratt

Island Swiftlet, Swiftlet, Island

Puffinus lherminieri; lherminieri; Puffinus

G. G. chloropus

, ,

from the Unginao-Uyulan archaeological site northern archaeological on the the Unginao-Uyulan from

1992 1992

Guam flycatcher, flycatcher, Guam

Ducula Ducula oceanica)

Procelsterna Procelsterna cerulea;

also extirpated on Rota. Although more bones are are bones more Although Rota. on extirpated also

species of birds were recovered from preliminary preliminary from were species recovered of birds

DAVID DAVID

Collocalia Collocalia vanikorensis)

from Unginao-Uyulan were bracketed by strata strata by bracketed were Unginao-Uyulan from

Introduction Introduction

York 12230. 12230. York

W. W.

Micronesian Megapode, Megapode, Micronesian

Myiagra

STEADMAN STEADMAN

have not been recorded previously previously recorded been not have

Gallicolumba Gallicolumba

swamphen?, swamphen?,

Erythrura Erythrura

cf.freycineti) cf.freycineti)

are known from Rota Rota from known are

Porphyrio? Porphyrio?

new sp.; large par­ large sp.; new

new sp.). An un­ An sp.). new

are previously are previously

& &

Megapodius Megapodius

& &

Andrew 1988, 1988, Andrew

Butler 1988). 1988). Butler

sp.; sp.; Mi­

Polio­

, , New New

be­

Gal­

Ober­

100 yr yr 100

Porzana Porzana

Engbring Engbring

± ±

& &

vanikorensis vanikorensis

Aerodramus Aerodramus

C. C.

rather rather than

mesh. mesh.

for for

Glass Glass except (1991) for

& &

/16" /16"

1

50 yr yr 50 BP and 1,920

and and

Poliolimnas Poliolimnas

± ±

¼", ¼",

Aerodramus Aerodramus

and and

Methods Methods

& &

Results Results G. G. R. Gray versus 1840

Area Area

1, visited visited 1, on January 31 is a 1990, shallow (up

G. owstoni, owstoni, G.

rather rather than

Micronesica Micronesica ), 1992 25(1

for for

Cave Cave

Study Study

Collocalia Collocalia

STRATIGRAPHY STRATIGRAPHY AND CHRONOLOGY

Rallus Rallus

Poiia. Poiia.

Collocalia Collocalia

exception exception was Payapai Cave (sometimes called Alaguan

An An

to to Rota, where rails are unknown historically (see Witteman et

I I use

Glass ( 1991 ). ). The current Glass 1991 ( status of extant species on Rota was

& &

rather rather than

Caves Caves 1-3 are near Rota's southernmost point, just inland from the main

Unless Unless stated otherwise, the modem distribution and status of Micronesian

Most Most of Rota's many caves were damaged heavily during the World War II

To To develop a prehistoric record of Micronesian birds, I surveyed caves for

P. cinereus; cinereus; P.

road road through Puntan

sediment sediment was sieved through screens of½",

modem modem skeletons from USNM, American Natural Museum of History, York New

sonian sonian Institution (USNM). Identifications were based upon comparisons with

State State Museum, and University of Washington Burke Museum. All excavated

Gallirallus Gallirallus

the the Department of Paleobiology, National Museum of Natural History, Smith­

holser holser see Peters The 1906; bones 1940:220). from Rota have been catalogued in

for for

cause cause of simple priority (

three three generic names: following Olson (1973) and Steadman (1987), I recognize

Nomenclature Nomenclature is that of Pratt et al. and (1987) Reichel

taken taken from Engbring et 1986), al. supplemented ( by my observations in 1990.

and and Reichel

( 1985), Pratt Pratt 1985), ( et al. (1987), Glass 1988), Engbring et ), ( Reichel 1990), al. ( (1991

birds birds were taken from Baker (1951), Engbring & Pratt (1985), Pyle

25 25 m wide. Aside from Payapai Cave, I located three smaller, unnamed caves

that that yielded much less significant vertebrate faunas.

on on Rota. Payapai Cave is located in a coralline limestone (uplifted cliff marine

is is much larger than most caves on Rota, with an entrance about 25 m high and

terrace) terrace) about m 150 from the island's southern shore, at 14°8'N, 145°13'E. It

scientific scientific value.

siliferous siliferous sediments were either removed, mixed, or crushed, eliminating their

Cave), Cave), which contained by far the largest prehistoric bone deposit that I found

fortified fortified as gun implacements and human shelters. As a result, potentially fos­

Japanese Japanese occupation of the island. The caves, most of which face the , were

cavation. cavation.

document document the numerous new records of birds uncovered during the initial ex­

lirallus owstoni) owstoni) lirallus

paleoecology paleoecology of Rota's prehistoric birds await further field work. Here I will

al. al. 1991). Additional details of the osteology, systematics, biogeography, and

to to provide biogeographic justification for translocation of the Guam Rail (

paper paper summarizes the results of my preliminary survey, which was done in part

BP, BP, respectively.

72 72 bone bone deposits on the island of Rota from 27 January to 6 February This 1990. radiocarbon radiocarbon dated (on wood charcoal) at 1,350

itnt taa eintd s aesI I, n II Fgr 2) (Figure III and II, I, Layers as designated strata distinct

thick in TPl, 8-13 cm thick in TP2) is a light grayish brown sandy, slightly slightly sandy, brown grayish light a is TP2) in thick cm 8-13 TPl, in thick

The stratigraphic sequences ofTPl and TP2 are similar, each consisting of three three of consisting each similar, are TP2 and ofTPl sequences stratigraphic The

up to 25 cm in depth. depth. in cm 25 to up Figure 1) in the very very the 1) in Figure

0.5 X 1.0 m test pit in each revealed poorly stratified, dark, organic sediment sediment organic dark, stratified, poorly revealed each in pit test m 1.0 X 0.5

visited on 2 February 1990, are also shallow (up to 2 m inside the dripline). A A dripline). the inside m 2 to (up shallow also 1990, are February 2 on visited

dark, organic sediment reached bedrock at depths of 38-45 cm. Caves 2 and 3, 3, and 2 Caves cm. 38-45 of depths at bedrock reached sediment organic dark,

to 4 m inside the dripline) shelter where a 0.5 X 1.0 m test pit in poorly stratified, stratified, poorly 1.0 in pit test m X where a 0.5 shelter dripline) the 4 inside m to

On 3-6 February 1991, I excavated two small, adjoining test pits (TPl, TP2, TP2, (TPl, pits test adjoining small, two 1991, I excavated February 3-6 On

Figure I. Plan view of the two test pits (TPl, TP2) excavated along the north wall, wall, north the along excavated TP2) (TPl, pits test two the of view Plan I. Figure

l esrmns r n meters in are measurements All

Payapai Cave, Rota. See Figure 2 for stratigraphic profile of west wall ofTPI. ofTPI. west wall profile of stratigraphic for 2 See Figure Rota. Cave, Payapai

N N

~ ~

0 0

1-

2-

~ ~

-

dry, dry,

' '

' '

" "

' '

TP1 TP1

powdery sediment about 30 m within Payapai Cave. Cave. Payapai within m 30 about sediment powdery

Steadman: Steadman: Extinct Birds Rota from

. .

......

\ \

. .

" "

0.85 0.85

TP2 TP2

. .

1.60 1.60

Layer I ( 4-12 cm cm ( I 4-12 Layer 73 73

of of

). ).

(1 (1

12 12

7 7

.

2

/C

Aplonis Aplonis

13

Gallinula Gallinula

sp. sp. (2); un­

Bu.Jo marinus marinus Bu.Jo

Bufo Bufo marinus

Rattus Rattus

Aplonis Aplonis opaca

smaller smaller

a a extinct species

2 2

P. tokudae, tokudae, P.

sp. sp. Common (10); Moorhen,

species species

a a lost from Rota, probably in the

which which still survives on Rota (Wiles et al.

FAUNA FAUNA

All measurements measurements All are in meters.

. .

Rattus Rattus

70 70 yr BP (Beta-36074; corrected for C

sp. sp. Although the specimens likely represent the

sp. ( 1 ); Micronesian ); Micronesian Starling, 1 sp. (

± ±

Micronesica 25(1 ), I 992 992 ), I 25(1 Micronesica

Pteropus Pteropus

P. P. mariannus,

Pteropus Pteropus

1 ). ). Cave 2: gecko, ); Gekkonidae 1 Micronesian Starling, 1 sp. (

Emballonura Emballonura semicaudata,

Charcoal Charcoal was extremely scarce in Layers I and III, and in both cases

for description description for of Layers 1-111

( (

%a}. %a}.

(2). Cave 3: fish, Osteichthyes sp. ( 1 ); introduced introduced ); marine toad, 1 Osteichthyes fish, ( sp. Cave 3: (2).

? ? t t

Figure Figure 2. Stratigraphic profile of west wall of TPI, Payapai Cave, Rota. See text

Payapai Payapai Cave yielded bones of fish, reptiles, mammals and, primarily, birds

Bones Bones of the following species were recovered from unnamed caves 1-3.

From From the base of Layer II in TP2, 12 grams of wood charcoal yielded a

? ?

t t

0 0

1989), I 1989), have not confirmed this by direct comparison. Thus I cannot rule out

that that some the bones of all or may not be from

Marianas Marianas Fruit Bat,

fruit fruit bat or fox, flying

late 1960s (Lemke 1986). The The second (Lemke most late abundant 1986). 1960s mammal an undetermined is

sp.; sp.; and a small skink, Scincidae sp.). The most common mammal is the sheath­

tailed tailed bat,

picbirds, picbirds, terns, or herons, all of which occur commonly in the bone deposit. The

bones bones of reptiles represent at least two species of lizards (a gecko, Gekkonidae

most most likely deposited in the cave by piscivorous birds, such as shearwaters, tro­

(Table 1 ). The fish bones bones The ). consist fish only (Table specimens a few of from 1 very small species,

( 1 ); gecko, Gekkonidae sp. ( 1 ); introduced ); introduced gecko, ); Gekkonidae 1 undetermined 1 sp. ( ( rat,

determined determined fruit bat,

opaca opaca

(9); introduced introduced (9); undetermined rat,

ch/oropus ch/oropus

Cave Cave fish, 1: Osteichthyes sp. (2 bones); introduced marine toad,

-27.3 -27.3

2 2

Layer Layer III.

may may have been intrusive from Layer II. The only other potentially datable organic

remains remains were bones and small fragments of plants in Layer I, and bones only in

single single radiocarbon date of 930

and and gypsum clasts are more angular in Layer III than in Layer I.

pebbles pebbles and no cobbles. Layer III (18-50+ cm thick in TPl, 4-24 cm thick in

TP2) is a yellowish orange orange TP2) a sandy, yellowish slightly is very pebbly, very cobbly silt. The calcite

.6 .6

pebbly, pebbly, slightly cobbly silt. Layer II (2-35 cm thick in TPl, 6-20 cm thick in

TP2) TP2) is a very dense concentration of wood charcoal, ash, and silt, with few

.4 .4 74 74

(Common Moorhen), was recovered elsewhere (Cave 1). The 13 species of birds birds of species 13 1). The (Cave elsewhere recovered was Moorhen), (Common

no longer on Rota fall into four categories, as follows. follows. as categories, four into fall Rota on longer no

occur on Rota. One bone of an additional extirpated species, species, extirpated additional an of bone One Rota. on occur et al. 1979, Engbring et al. 1986, Lemke 1986, E. Taisacan, pers. comm.). comm.). pers. Taisacan, E. 1986, Lemke 1986, al. et Engbring 1979, al. et

formerly by Island Swiftlets Swiftlets Island by formerly

ballonura semicaudata), semicaudata), ballonura Aplonis opaca, opaca, Aplonis

the deposit (including bones of juveniles), particularly on the surface and in Layer Layer in and surface the on particularly of juveniles), bones (including deposit the

I. I. and Pacific Reef-Heron Reef-Heron Pacific and

Tropicbird

roof. Other species that currently nest or roost in the cave are the White-tailed White-tailed the are cave the in roost or nest currently that species Other roof. common species throughout the deposit is the extant Micronesian Starling, Starling, Micronesian extant the is deposit the throughout species common

species (Table 2), of which five are seabirds and 16 are landbirds. By far the most most the By far landbirds. 16 are and seabirds five are which of 2), (Table species

as AD 1602 (Driver 1989:12). 1989:12). (Driver 1602 AD as

dant on Rota today. Rats (species undetermined) were common on Rota as early early as Rota on common were undetermined) (species Rats today. Rota on dant

skeletons of the Pacific rat, rat, Pacific the of skeletons

its current scarcity. The few bones of of bones few The scarcity. current its

Rota to Guam for human consumption (Wiles & Payne 1986), contributing to to contributing 1986), Payne & (Wiles consumption human for Guam to Rota

to 1981, 400 to 1,900 individuals of of 1,900 individuals to 400 1981, to

on Guam, the only island where it ever was recorded (Wiles 1987). From 1975 1975 From 1987). (Wiles recorded was ever it where island only the Guam, on

ubr rpeet dniid bones identified represent Numbers

Surface Surface

Totals Totals

Rattus Rattus

Pteropus Pteropus

Emballonura Emballonura

Scincidae sp. sp. Scincidae

eknde sp Gekkonidae

Osteichthyes sp. sp. Osteichthyes

Species Species

As indicated by both bones and guano, Payapai Cave also had been occupied occupied been had also Cave Payapai guano, and bones both by indicated As

Table Table

Unknown rat rat Unknown

semicaudata semicaudata

Sheath-tailed Bat Bat Sheath-tailed Unknown fruit bat bat fruit Unknown

skink skink

Unknown small small Unknown

Unknown gecko gecko Unknown

Unknown small fish fish small Unknown

Twelve of the 21 species of birds recorded from Payapai Cave no longer longer no Cave Payapai from recorded birds of species 21 the of Twelve

The 316 identifiable bones recovered from Payapai Cave represent 21 21 represent Cave Payapai from recovered bones bird identifiable 316 The

sp. sp.

= =

I. I.

sp. sp.

surface of cave floor cave of surface

Vertebrates other than birds recovered from preliminary excavations at Payapai Cave, Cave, Payapai at excavations preliminary from recovered birds than other Vertebrates

Phaethon lepturus, lepturus, Phaethon

Rota, Commonwealth of the Northern Mariana Islands, February 1990. 1990. February Islands, Mariana Northern the of Commonwealth Rota,

. .

which still nests on small ledges in well lighted parts of the cave's cave's the of parts lighted well in ledges small on nests still which

Status Surface Surface Status

X? X?

X? X?

X? X?

X? X?

X X

E E

Egretta sacra, sacra, Egretta

both of which died out on Rota in recent decades (Pratt (Pratt decades recent in Rota on out died which of both

; ;

I, II I,

(Collocalia vanikorensis) vanikorensis) (Collocalia

R. exulans, exulans, R.

Steadman: Extinct Birds from Rota Rota Birds from Extinct Steadman:

. .

, ,

E E

III, Mixed Mixed III,

White Tern or Common Fairy-Tern Fairy-Tern Common or Tern White

= =

2 2

2 2

xiptd n Rota on extirpated

P. mariannus mariannus P.

each of which also is well represented in in represented well is also which of each

or the black rat, rat, black the or

= =

Rattus Rattus

stratigraphic layers (see text for details). details). for text (see layers stratigraphic

30 30

11 11

4 4

3 3

4 4

7 7

sp. have not been compared to to compared been not have sp.

Level Level

were exported each year from from year each exported were

. .

and Sheath-tailed Bats Bats Sheath-tailed and

II III Mixed Total Total Mixed III II

X X

6 6

3 10 10 3

= =

R. rattus, rattus, R.

tl ocr o Rt. Levels Rota. on occurs still

72 72

25 25

34 34

Galli Galli ch/oropus nu/a

3 3

which is abun­ is which

35 35

11 11

17 17

Gygis alba, alba, Gygis

3 3

3 3

(Em­

145 145

43 43

19 19

63 63

10 10

6 6

4 4

75 75 : :

2 2

3 3

2 2

4 4

10 10

16 16

10 10

16 16

59 59

46 46

Total Total

1# 1#

4 4

3 3

16 16 122

5 5

Mixed Mixed

8 8

2 2

8 8

72 72

13 13 2 16

28 28 4

III III

5 5

2 2

II II

Level Level

2 2 2 8

7 7

3 3

29 29

8 8 6

4 4

41 41 12

Micronesica 25( I), I), 1992 25( Micronesica

E E

X X

X X

E E

X X

E E

X X

E E

E E

X X E E

X X

X X

E E

X X

Status Status Surface I

Commonwealth Commonwealth of the Northern Mariana Islands, February 1990.

new new sp. E

sp. sp. E

Species Species of birds recovered from preliminary excavations at Payapai Cave, Rota,

. .

Ground-Dove Ground-Dove

Ground-Dove Ground-Dove

Megapode Megapode

Table Table 2

Bridled Bridled White-Eye

conspicillatus conspicillatus

Porphyrio? Porphyrio?

Micronesian Micronesian Starling

Island Island Swiftlet

Extinct Extinct Parrot

Micronesian Micronesian Pigeon

Mariana Mariana Fruit-Dove

Extinct Extinct Giant

White-throated White-throated

xanthonura xanthonura Swamphen? Swamphen?

White-browed White-browed Crake

Micronesian Micronesian

Rota Rota Duck

Pacific Reef-Heron Reef-Heron Pacific

Common Common Fairy-Tern Blue-gray Noddy Noddy Blue-gray

White-tailed White-tailed

Tropicbird Tropicbird

Red-tailed Red-tailed

Tropicbird Tropicbird

Shearwater Shearwater

Audubon's Audubon's

Zosterops Zosterops

Col/oca/ia vanikorensis vanikorensis Col/oca/ia

Ap/onis opaca opaca Ap/onis

*Psittacidae *Psittacidae new sp. E

Ducula oceanica oceanica Ducula

Pti/inopus roseicapilla roseicapilla Pti/inopus

*Gallicolumba *Gallicolumba

Gal/icolumba Gal/icolumba

cf. cf.

Poliolimnas cinereus cinereus Poliolimnas

Landbirds Landbirds

Megapodius /aperouse /aperouse Megapodius *Anatidae *Anatidae new sp.

Gygisa/ba Gygisa/ba Egretta sacra sacra Egretta

Procelsterna ceru/ea ceru/ea Procelsterna

Phaethon /epturus /epturus Phaethon

Phaethon rubricauda rubricauda Phaethon

Puffinus /herminieri /herminieri Puffinus

Seabirds Seabirds 76 76

Rota. Rota.

crake and moorhen prefer freshwater wetlands, which no longer are present on on present are longer no which wetlands, freshwater prefer moorhen and crake

ian, and , surviving on all except Pagan (Stinson et al. 1991 1991 the Both al. ). et (Stinson Pagan except all on surviving Pagan, and ian,

only on Guam (Baker 1951), the crake probably was gone from Guam by the the by Guam from gone was probably crake 1951), the (Baker Guam on only

chloropus; chloropus;

lands: White-browed Crake, Crake, White-browed lands: Aguijan, and . Saipan. and Aguijan,

Within the Marianas, swiftlets survive in small to moderate numbers on Guam, Guam, on numbers moderate to small in survive swiftlets Marianas, the Within

on Guam, Rota, and perhaps . The swiftlet was last observed on Rota in in Rota on observed last was swiftlet The Tinian. perhaps and Rota, Guam, on

1950s or early 1960s. The moorhen has been recorded from Guam, Saipan, Tin­ Saipan, Guam, from recorded been has moorhen 1960s. The 1950s early or

Megapodes once occurred throughout the Marianas. They have been extirpated extirpated been have They Marianas. the throughout occurred once Megapodes

are known to transport megapode eggs between islands (Engbring et al. 1986). 1986). al. et (Engbring islands eggs between megapode transport to known are

have been seen on Rota in 1985 (Wiles et al. 1987), although indigenous people people indigenous 1987), although al. 1985 et (Wiles in Rota on seen been have

in 1888 (Oustalet 1896:27; Baker 1951:111). A single juvenile megapode may may megapode juvenile single A 1951:111). 1896:27; Baker (Oustalet 1888 in

1976, at Payapai Cave and other localities (Pratt et al. 1979, 1979, 1986). et al. Engbring al. et (Pratt localities other 1976, Cave and Payapai at

taken in July 1888 by 1888 July in taken

& & Glass 1991:4). No populations of of populations No 1991:4). Glass

Marianas. The megapode apparently died out on Rota early this century (Pratt (Pratt century this early Rota on out died apparently megapode The Marianas.

Micronesian Megapode, Megapode, Micronesian

vanikorensis. vanikorensis.

All birds (E) 12. 12. (E) birds All

Seabirds (E (E Seabirds

for details). • • details). for

Levels

Numbers represent identified bones. E E bones. identified represent Numbers

Totals: Bones Bones Totals:

Myzomela rubrata rubrata Myzomela

Myiagra Myiagra

Erythrura Erythrura

Seabirds Seabirds

Micronesian Micronesian Flycatcher Guam

Extinct Parrot-Finch Parrot-Finch Extinct

Bruner 1978), the only certain record being a specimen collected by Marche Marche by collected specimen a being record certain only 1978), the Bruner

Honeyeater Honeyeater

.Peiul nnw o Rt bt eoddesweei h Mraa Is­ Mariana the in elsewhere recorded but Rota on unknown Previously 2.

1. Known historically on Rota: Audubon's Shearwater, Shearwater, Audubon's Rota: on historically 1. Known

: :

%E %E

(E (E (E only) only) (E

Species Species

Surface Surface

Species Species

cf. cf.

+ +

new sp. sp. new

+ +

and Guam Flycatcher, Flycatcher, Guam and

freycineti freycineti

X) X)

= =

) 5 X)

= =

extinct species. species. extinct

The shearwater had been known on Rota only from a specimen specimen a from only Rota on known been had shearwater The

surface of cave floor. Mix Mix floor. cave of surface

; ;

Seabirds (E) 2; Landbirds (E (E Landbirds 2; (E) Seabirds

Status Surface Surface Status

A. A.

X X

E E

E E

Megapodius laperouse; laperouse; Megapodius

# #

Marche (Oustalet 1896:56; Baker 1951:68; 1951:68; Reichel 1896:56; Baker (Oustalet Marche

Steadman: Extinct Birds from Rota Rota from Birds Extinct Steadman:

= =

Poliolimnas cinereus; cinereus; Poliolimnas

specimen cemented on wall. Total species (all layers combined) layers (all species Total wall. on cemented specimen

Table 2. 2. Table

= =

Myiagra cf.freycineti. cf.freycineti. Myiagra

47 47

xiptd r xic o Rota on extinct or extirpated

0 0

0 4 4 0

4 4

P. lherminieri lherminieri P.

= =

ie layers mixed

+ +

Continued. Continued.

) 16 X)

36 36

66 21 146 36 316 316 36 146 21 66

II II

; ;

adid () 10 (E) Landbirds

. .

and Island Swiftlet, Swiftlet, Island and

Level Level

I, II, III III II, I,

Common Moorhen, Moorhen, Common

are known to survive in the the in survive to known are

60 60

10 10

II II

6 6

Recorded in the Marianas in Marianas the Recorded

= =

. .

stratigraphic layers (see text text (see layers stratigraphic

X X

62 50 57 57 50 62

III III 13 13

Puffinus lherminieri; lherminieri; Puffinus

8 4 4 8

2 2

= =

; ;

All birds (E (E birds All

tl cus n Rota on occurs still

Mixed Total Total Mixed

8 8

Collocalia Collocalia

Gallinula Gallinula

+ +

X) 21 X)

21 21

12 12

2 2

& &

77 77

; ;

: : . .

Por­

in in the

except except

rather rather than

78-84 78-84 mm in

M. M. p/uto

swamphen?, swamphen?,

are are 14.3-15.0 mm

Proce/sterna Proce/sterna

Myiagra Myiagra

was was known only from

The The nearest population

Porphyrio Porphyrio porphyrio pe/ew­

Myiagra Myiagra

M. freycineti, M. freycineti,

new new sp. from Payapai Cave indicate

became became extinct in about Clas­ 1985.

M. M. freycineti

new new sp.; large parrot, Psittacidae new

Procelsterna cerulea; cerulea; Procelsterna

James James 1991) and very juvenile volant

& &

from from Belau, Chuuk, or Guam. Like the

from from and 15.2-16.0 mm

Ducu/a Ducu/a oceanica.

new new sp.). Additional material is desired for

by Baker ( 1951 :277) but but :277) generally recognized 1951 by Baker (

This This size difference in bones is roughly propor­

Gallicolumba Gallicolumba

Micronesica Micronesica 25(1), 1992

Myiagra Myiagra

Gallicolumba Gallicolumba

Erythrura Erythrura

and and

or or any other regional monarchine in the distinctive

Myiagra Myiagra Jreycineti

from from , but is smaller (total length mm 16.0 com­

M. M. oceanica

from from Halmahera, Northern Moluccas. Skeletons are not

M. M. p/uto).

Pratt Pratt The 1985). Micronesian Pigeon occurs through much of

& &

M. M. caledonica caledonica

M. M. ga/eata

Baker Baker Humeral 1951:276). lengths of other

Ducula Ducula oceanica

sp.; sp.; and Micronesian Pigeon,

10) 10) in

5) 5) in (Engbring (Engbring

The The undescribed duck is represented by a juvenile single coracoid (USNM

4. Extinct Extinct 4. and undescribed species (a small, perhaps duck, flightless Anatidae

3. 3. Not recorded previously from the Mariana Islands but still occurring

The The flycatcher is represented by a humerus (USNM 453471) and ulna

= =

= =

Monarcha, , Rhipidura,

size size of entire humeral end, and orientation of cotyla scapularis (facing nearly

surface, surface, extent of convexity of ventral surface, great amount of widening toward

sternal sternal end, reduced development of the procoracoid , great reduction in

anatids anatids (the "moa-nalo's"; see Olson

anatids, anatids, rather than those of flightless rails, in the extent of concavity of dorsal

436620). 436620). This unusual specimen agrees with the coracoid of flightless Hawaiian

theless, theless, some preliminary remarks are warranted. sp.; sp.; and large parrotfinch,

new new sp.; giant ground-dove,

each each of these species before they can be named and described properly. Never­

that that this absence is a recent event.

(1951:198) (1951:198) noted the conspicuous absence of large pigeons in the Marianas. The

bones bones of populations populations are candidates for endangered status (Engbring & Pratt Baker 1985).

Micronesia Micronesia (Belau, Yap, Chuuk, Pohnpei, Kosrae, Marshalls), although certain

ensis ensis

as as tentative. The nearest and only other Micronesian record of a swamphen is

the the small Palauan population of Purple Swamphen, imal imal end a radius of (USNM 453552), and thus identification its must regarded be

past. past. The probable swamphen from Payapai Cave is based only on a single prox­

off Thailand off Thailand (Taylor suggest 1989), a much greater range for

of Blue-gray of Blue-gray Noddies is on Bikar in the , 2,700 km east of Rota.

The The record from Rota, and an unconfirmed sight record from the Andaman Sea

elsewhere elsewhere in Micronesia: Noddy, Blue-gray

Guam, Guam, where it had been regarded as endemic.

for for being slightly smaller.

sified as a subspecies a as subspecies sified of

phyrio? phyrio? humerus, humerus, the ulna from Payapai Cave is inseparable from that in

as as a full species today (Pratt et al. 1987),

available available for populations of

(n (n

(n (n

tional tional to that in wing measurements (65-73 mm in

M. M. pluto; pared pared to 17.3 mm in

slender slender shaft. USNM 453471 is qualitatively inseparable from the humerus in

Myiagra Myiagra p/uto oceanica shapes shapes of the caput humeri and both fossae pneumotricitalis, as well as in the

in in

(USNM (USNM 436625). USNM 453471 agrees with the humerus in 78 78

.I .I

relatively long bill, whereas a complete pedal claw (USNM 436641) seems to to seems 436641) (USNM claw pedal complete a whereas bill, long relatively

reminiscent perhaps of a medium to large-sized meliphagid (honeyeater) with a a with (honeyeater) meliphagid large-sized to medium a of perhaps reminiscent

Cave that probably represent additional extinct or extirpated species but are too too are but species extirpated or extinct additional represent probably that Cave

fragmentary to identify even to family. A partial rostrum (USNM 453427) is is 453427) (USNM rostrum partial A family. to even identify to fragmentary

in Belau, Chuuk, Pohnpei, and Kosrae. Kosrae. and Pohnpei, Chuuk, Belau, in

from New Caledonia, 13.0-13.8 mm (n (n mm 13.0-13.8 Caledonia, New from

Artamus, Hirundo) Hirundo) Artamus,

Acrocephalus, Myiagra, Monarcha, Rhipidura, Myzomela, Foulehaio, Aplonis, Aplonis, Foulehaio, Myzomela, Rhipidura, Monarcha, Myiagra, Acrocephalus, with a total length of 16.3 mm compared to 12.9-13.8 mm (n (n mm 12.9-13.8 to compared 16.3 mm of length total a with

surface of condylus ventralis. USNM 436622 is larger than in any congeners, congeners, any in than larger is 436622 USNM ventralis. condylus of surface

caput humeri and tuberculum dorsale; and more bilaterally symmetrical distal distal symmetrical bilaterally more and dorsale; tuberculum and humeri caput

of margo caudalis; in cranio-ventral aspect, concave silhouette of area between between area of silhouette concave aspect, cranio-ventral in caudalis; margo of

shape and position of both fossae pneumotricipitalis; stout shaft; size and shape shape and size shaft; stout pneumotricipitalis; fossae both of position and shape

genera of the region region the of genera passerine 15.3 mm (n (n 15.3 mm

plete humerus (USNM 436622) that is referred to to referred is that 436622) (USNM humerus plete

14.2 mm (n (n 14.2 mm

different angle of the diagonal muscle scar on the caudal surface of the shaft. shaft. the of surface caudal the on scar muscle diagonal the of angle different

(the only extant species in the ) because of its slightly larger size and the the and size larger slightly its of because genus) the in species extant only (the

equivocally if it is referable to to referable is it if equivocally

a more distinct impressio ligamentum collateralis medialis and a more distinct distinct more a and medialis collateralis ligamentum impressio distinct more a fte hf. oe pcmn o hs ag art r nee t dtrie un­ determine to needed are parrot large this of specimens More shaft. the of

diagonal muscle scar running distad from crista fibularis on the caudal surface surface caudal the on fibularis crista from distad running scar muscle diagonal

436602 436602 agrees with

Solomons, , ; introduced to Belau this century). USNM USNM century). this Belau to introduced Australia; Guinea, New Solomons,

tralia), or Eclectus Eclectus or tralia),

aterrimus aterrimus

436602) roughly the size and shape of that in the Palm Cockatoo Cockatoo Palm the in that of shape and size the roughly 436602)

tarsometatarsus, and pedal phalanx (USNM 436623, 436660, 436588). It is most most is It 436588). 436660, 436623, (USNM phalanx pedal and tarsometatarsus, new sp. from East Polynesia (Steadman in press). press). in (Steadman Polynesia East from sp. new

similar in size and other features to the largest species in the genus, genus, the in species largest the to features other and size in similar

abilities of the extinct whistling duck (cf. (cf. duck whistling extinct the of abilities

Cook Islands is undetermined (Steadman 1991 1991 ). (Steadman undetermined is Islands Cook

New Zealand region (Worthy 1988, Livezey 1989) and (Olson (Olson Hawaii and 1989) Livezey 1988, (Worthy region Zealand New

the Mariana Islands, mainly as migrants (Reichel (Reichel migrants as mainly Islands, Mariana the bling ducks ducks bling

able. During the 20th century, at least 11 species of of 11 species least at century, 20th the During able. huh eei eainhp aedfiutt icr i ti snl pcmn dab­ specimen, single this in discern to difficult are relationships generic though

360 s uh mle ta te oaod n n o te aain pce. Al­ species. Hawaiian the of any in coracoid the than smaller much is 436620

perpendicular to, rather than nearly parallel to, the long axis of the bone). USNM USNM bone). of the axis long the to, parallel nearly than rather to, perpendicular

1991 ), flightless or nearly flightless ducks are unknown in the Pacific. The flying flying The Pacific. the in unknown are ducks flightless 1991 nearly or flightless ),

Aside from the taxa listed in Table 2, there are two bones from Payapai Payapai from bones two are there 2, Table in listed taxa the from Aside

The extinct parrotfinch, parrotfinch, extinct The

The large parrot, Psittacidae new sp., is represented by a tibiotarsus (USNM (USNM tibiotarsus a by represented is sp., new Psittacidae parrot, large The

The giant ground-dove, ground-dove, giant The

(New Guinea, Australia), Pink Cockatoo Cockatoo Pink Australia), Guinea, (New

= =

= =

(Anas (Anas

6) 6) in

1) 1) in

spp.) should be examined closely when more material is avail­ is material more when closely examined be should spp.)

Parrot Parrot

Eclectus Eclectus

because of these characters: unique width, depth, and overall overall and depth, width, unique characters: these of because

E. prasina. prasina. E.

E

. .

cyaneovirens pealei, pealei, cyaneovirens

Eclectus Eclectus

Steadman: Extinct Birds from Rota Rota from Birds Extinct Steadman:

and disagrees with with disagrees and

Gallicolumba Gallicolumba

Erythrura Erythrura

Eclectus. Eclectus.

The nearest occurrence of of occurrence nearest The

(Cleptornis, Rukia, Zosterops, Coracina, La/age, La/age, Coracina, Zosterops, Rukia, (Cleptornis,

roratus roratus

If If

new sp., is represented by a single com­ single a by represented is sp., new

= =

so, so,

(Lesser Sundas, Moluccas, Bismarcks, Bismarcks, Moluccas, Sundas, (Lesser

13.8-14

Dendrocygna Dendrocygna

new sp., is represented by a mandible, mandible, a by represented is sp., new

4) in captive captive in 4)

it it

Probosciger Probosciger

is unlikely to represent represent to unlikely is

.

& &

5 mm (n (n 5 mm

Erythrura Erythrura

Anas Anas

Glass 1991). Outside of the the of Outside 1991). Glass

Cacatua leadbeateri leadbeateri Cacatua

Erythrura Erythrura

E. psittacea, psittacea, E.

new sp.) from Aitutaki, Aitutaki, from sp.) new

and and

have been recorded in in recorded been have

= =

= =

Cacatua Cacatua

rather than other other than rather

4) 4) in

2) 2) in

is is

Gallicolumba Gallicolumba

E. psittacea, psittacea, E.

E. trichroa, trichroa, E.

Probosciger Probosciger

E. trichroa trichroa E.

n 14.9- and

E. roratus roratus E.

in having having in

& &

James James

(Aus­ 79 79

Pyr­

Falco, Falco,

Butler Butler

& &

(Japanese (Japanese

Asio j/am­ Asio

(Peregrine Fal­ (Peregrine

but but smaller than

(Common (Common Buzzard),

Accipiter Accipiter gu/aris

(Amur (Amur Red-footed Falcon),

F. peregrinus peregrinus F.

Ap/onis Ap/onis opaca

Buteo Buteo buteo

(Black Kite), Kite), (Black

25(1), 25(1), 1992

F. F. amurensis

typically typically are ornithophagous. There are no

Discussion Discussion

TAPHONOMY TAPHONOMY

in either Micronesia or Polynesia today. Various Various today. Polynesia or either in Micronesia

(unrecorded (unrecorded in Micronesia but widespread and

migrans migrans

Falco Falco

Micronesica Micronesica

(Chinese Goshawk), Goshawk), (Chinese

(Short-eared (Short-eared Owl) have been recorded as migrants at

and and

Milvus Milvus

Accipiter Accipiter

Tyto Tyto alba

all all poorly studied, occur in . Concerning

Endemic Endemic to this Belau, is owl small and primarily feeds on

(Eurasian (Eurasian Kestrel),

Accipiter Accipiter

A. A. so/oensis

Leach 1988) and only three identifiable bird bird and three bones (Becker only identifiable Leach 1988)

(Northern (Northern hypothetical Hobby; record),

Accipiter, Accipiter,

& &

Asio Asio jlammeus

on on Pohnpei. The of scarcity rat bones in Payapai Cave argues against the

Species of of Species

There There are no resident avian predators on Rota or anywhere in the Mariana

The The great variety of small vertebrates (lizards, bats, birds) in the Payapai

I I interpret the vertebrate fauna of Payapai Cave as being accumulated pri­

species of species

resident populations populations resident of

exists on on exists Rota today.

of rats or anything else on the floors, I am confident that no cave-dwelling predator predator cave-dwelling that no confident am I floors, the on else anything or rats of

dant and conspicuous rats are on Rota today, and how nearly all caves lack bones bones lack dant and caves on rats Rota are conspicuous all nearly and today, how

often common often common in Polynesia and as Melanesia), a candidate the for extinct/extir­

meus meus

pated pated avian predator postulated to have on existed Rota. abun­ how Considering

rhog/aux rhog/aux podargina.

Common Common Barn-Owl, invertebrates invertebrates (Pratt et The al. next 1987:215). nearest resident is owl

various various places in the Marianas. The nearest resident is owl the Belau Owl,

con), con), and

Sparrowhawk), Sparrowhawk),

Islands Islands today, although

F. subbuteo F. subbuteo

Falco Falco tinnunculus

created created themselves (Steadman 1986).

often often are very poorly represented in cave sites, even in bone deposits that they

of of little consequence in a sample as small as 316 bones because birds of prey

1988), while Payapai Cave yielded 10 fish bones bones Payapai (none to while identifiable and yielded genus) fish Cave 10 1988),

Cave Cave deposit that suggests a predatory bird was involved in accumulating the

bones. bones. Even though no bones of hawks, or falcons, were recovered, owls this is

316 316 bird bones (Table 2). The complete lack of marine invertebrate remains

comprises comprises Layer II, is not anthropogenic.

which which lacks cultural features other than the thick band of wood charcoal that

(mollusks, (mollusks, urchins, etc.) is another indication that the Payapai Cave deposit,

(Davidson (Davidson

the the northern coast of Rota, for example, produced 261 identifiable fish bones

lizards, sheath-tailed lizards, sheath-tailed bats, and swiftlets, . Four sites archaeological on

the the dominance bones of of small minimal of species interest to humans, such as

of of bones of humans, and pigs, , the scarcity of bones of fish and rats, and or or within roosting the and cave; avian 2), predators. That this paleofauna is not

archaeological in in archaeological origin indicated is by its composition, particularly the absence

marily marily or by solely two non-human ), agents: natural l deaths of nesting species

Corvus kubaryi. Corvus kubaryi.

represent represent a non-meliphagid passerine than larger 80 80

responsible for these losses (see discussion of human impact on island birds in in birds island on impact human of discussion (see losses these for responsible

Engbring Engbring resided on Rota, 13 (62%) are gone. For now I assume that human impact was was impact human that assume I now For gone. (62%) 13 are Rota, on resided

sample size of bones. Of the total 21 species of landbirds now known to have have to known now landbirds of species 21 total the Of bones. of size sample

fous Fantail Fantail fous

Collared Kingfisher Kingfisher Collared

from the bone deposit in Payapai Cave: Yellow Bittern Bittern Yellow Cave: Payapai in deposit bone the from

thousands of years ago. The first example of a Micronesian "pseudoendemic" is is "pseudoendemic" Micronesian a of example first The ago. years of thousands

the "Guam" "Guam" the

to a single island will be found to have had much larger ranges hundreds or or hundreds ranges larger much had have to found be will island single a to

have suggested in Polynesia. Polynesia. in suggested have as in East Polynesia (Steadman 1989), many volant species supposedly endemic endemic supposedly species volant 1989), many (Steadman Polynesia East in as

that once were part of their natural distribution, as Franklin and Steadman ( ( 1991) Steadman and Franklin as distribution, natural of their part were once that

also will be important to evaluate the feasibility of translocating species to islands islands species to of translocating feasibility the evaluate to also will important be

the expanded passerine communities that existed in the past. This information information This past. the in existed that communities passerine expanded the

passerines, we may have adequate information to interpret the paleoecology of of paleoecology the interpret to information adequate have may we passerines,

ied the foraging ecology, microhabitat use, and social behavior of small passerines passerines of small social behavior and use, foraging ecology, ied microhabitat the

represented elsewhere in the Mariana Islands today. Craig (1989, 1990) has stud­ 1990) has (1989, Craig today. Islands Mariana the in elsewhere represented on Saipan and Tinian. When similar studies are conducted for other Micronesian Micronesian other for conducted are studies similar When Tinian. and Saipan on

there of species of of species of there o h iln' pseie omnt. ae uo mdm itiuin, n im­ an distributions, modem upon Based community. passerine island's the to

proved prehistoric record of birds from Rota might also reveal the past occurrence occurrence past the also reveal might Rota of from birds record prehistoric proved

the disappearance of at least the first two species. Rats and perhaps cats also may may also cats perhaps and Rats species. two first the least at of disappearance the

have been involved in the loss of Rota's rails. rails. Rota's of loss the in involved been have lived on the island. Human-related losses of wetlands probably was a factor in in factor a was probably wetlands of losses Human-related island. the on lived

three other rails rails other three

translocated to Rota (Witteman et al. 1991). The current sample of bones is too too is bones of sample current 1991). The al. et (Witteman Rota to translocated

Rail ( ( Rail small for this absence to be significant. Rota's caves did produce evidence that that evidence produce did caves Rota's significant. be to absence this for small

birds of prey, I believe that that believe I prey, of birds

iana Islands). Perhaps Perhaps Islands). iana sponsible for much of the paleofauna from Payapai Cave. Cave. Payapai from paleofauna the of much for sponsible

ocn sad (0 m N o oa 40k N ftenrhrms Mar­ northernmost the of NW km 400 Rota, of NNW km (800 Islands

The resident population of of population resident The

on cliffs that provide easy access to shorelines, a setting like that of Payapai Cave. Cave. Payapai of that like setting a shorelines, access easy to cliffs provide on that birds, including a variety of both seabirds and landbirds as well as bats and geckos geckos well as and as bats landbirds and seabirds of both a variety including birds,

the resident Peregrine Falcons in Fiji in Falcons Peregrine resident the (White et al. 1988). The Peregrine Falcons in Fiji also prefer to roost and nest nest and roost to prefer also Fiji in Falcons Peregrine The 1988). al. et (White

Four species of extant, indigenous landbirds from Rota were not recorded recorded not were Rota from landbirds indigenous extant, of species Four

As the prehistoric data base for Micronesian birds improves, I predict that, that, predict I improves, birds Micronesian for base data prehistoric the As

The limited prehistoric record from Rota has added added has Rota from record prehistoric limited The

By brief survey of Rota did not yield any bones of a rail similar to the Guam Guam the to similar rail a of bones any yield not did Rota of By survey brief

Gal/iral/us owstom), owstom), Gal/iral/us

& &

Pratt 1985, King 1985, and Steadman 1989). The number of lost lost of number The 1989). Steadman and 1985, King 1985, Pratt

(Rhipidura rufifrons). rufifrons). (Rhipidura

flycatcher, flycatcher,

(Po/iolirnnas cinereus, Gal/inula chloropus, Porphyrio? Porphyrio? chloropus, Gal/inula cinereus, (Po/iolirnnas

(Halcyon chloris), chloris), (Halcyon

Monarcha, Acrocephalus, Acrocephalus, Monarcha,

F. peregrinus peregrinus F.

EXTINCTION AND BIOGEOGRAPHY BIOGEOGRAPHY AND

Myiagra Jreycineti, Jreycineti, Myiagra

which recently was extirpated on Guam but is being being is but Guam on extirpated was recently which

Steadman: Extinct Birds from Rota Rota from Birds Extinct Steadman:

F. peregrinus peregrinus F.

F. peregrinus peregrinus F.

Their absence probably is an artifact of small small of artifact an is probably absence Their

once resided in the Mariana Islands. Of all all Of Islands. Mariana the in resided once

Mariana Crow Crow Mariana

(F. peregrinus nesiotes) nesiotes) peregrinus (F.

nearest to Rota is is Rota to nearest

s h ms lkl t hv be re­ been have to likely most the is

now known from Rota. Rota. from known now

and and

Cleptornis, Cleptornis,

(Corvus kubaryi), kubaryi), (Corvus

Erythrura Erythrura

(lxobrychus sinensis), sinensis), (lxobrychus

F. p. Jruitii Jruitii p. F.

each of which is is which of each

feed heavily on on heavily feed

and and

Myriagra Myriagra

n Ru­ and

sp.) once once sp.)

in the the in 81 81

Pimm, Pimm, J. D.

B. M. M. B. Butler,

L. L.

In In

Olson, Olson, S.

L. L.

Pimm, Pimm, M. Ripley, S. D. Ripley,

B. B. M. Butler (ed.), Archaeological

L. L.

In In

Olson, Olson, S.

S. A. A. S. Temple (ed.), Bird Conservation 2, pp.

References References

L. L.

In In

Acknowledgments Acknowledgments

Micronesica Micronesica 25(1), 1992

Wiles Wiles improved the manuscript. This is contribution number

Stephenson, Stephenson, Taisacan, E. and G. Witteman. I particularly thank

F. F. Leach. Fish 1988. bone.

J. J.

R. R. & &

1951. 1951. The avifauna of Micronesia, its origin, evolution, and distri­

J. J. Craig, H. Kurashina, N. G. Miller, S.

H. H.

J. J. 1989. Observations on the foraging ecology and social behavior of

R. R.

R. R.

R. R.

1602. 1602. Micronesia Area Research Center, Univ. Guam. 33 pp.

71-105. 71-105. Univ. Wisconsin Press, Madison, Wisconsin.

status, status, and future prospects.

92 92 pp.

8. 8.

Derrickson, Derrickson, H. Kurashina, S.

Southern Southern Illinois Univ. Carbondale Center Archaeo. Invest. 0cc. Pap. No.

Investigations Investigations on the North Coast of Rota, Mariana Islands, pp. 335-356.

eyes eyes (Zosteropidae) on Saipan, Micronesia. Auk 107: 500-505.

the the Bridled White-Eye. Condor 91: 187-192.

Invest. Invest. 0cc. Pap. No. 8. threatened threatened birds. Int. Council Bird Pres. Tech. Pub. 8: 1-383.

lands, lands, pp. 473-475. Southern Illinois Univ. Carbondale Center Archaeol.

ed. ed. Archaeological Investigations on the North Coast of Rota, Mariana Is­

bution. bution. Univ. Kansas Pub. Mus. Nat. Hist. 3: 1-359.

S. S. Dillon Ripley very generously funded the field research. I appreciate his

Our Our first glimpse of a prehistoric Micronesian avifauna indicates that great

R. R.

D. D. Reichel,

Engbring, Engbring, J. & H. D. Pratt. 1985. Endangered birds in Micronesia: their history,

Engbring, Engbring, J. 1988. Field Guide to the Birds of . Conserv. Koror, Off., Palau.

Driver, Driver, M. G. The Account 1989. of Fray Juan Pobre's Residence in the Marianas,

Davidson, Davidson, J.

Craig, Craig, R. J. Foraging 1990. behavior and microhabitat use two of species of white­

Craig, Craig,

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Becker, Becker, J. J. & B. M. Butler. 1988. Nonfish vertebrate remains.

Baker, Baker,

690 690 of the New York State Museum and Science Service.

Reichel, Reichel, and G.

Derrickson, Derrickson, Reichel, and Taisacan for helping to excavate at Payapai Cave. D.S. ments ments by

Pahlavan Pahlavan assisted in curation, while G. Petri helped with library research. Com­

S. S.

ation ation and assistance kindly were provided by R. E. Beck, M. B. Beehler, W. Burt, J. J.

in in part by National Science Foundation grant BSR-8607535. Logistical cooper­

continuing continuing interest in tropical island birds. Laboratory analysis was supported

of of birds remains to be explored.

Probably Probably the same is true elsewhere in Micronesia, where the prehistoric record

losses losses of birds occurred in the Mariana Islands since the arrival of humans.

are are expanded.

species species on Rota almost surely will increase when excavations at Payapai Cave 82 82

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