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Birds of El Triunfo Cloud Forest, Mexico, with Notes on the Horned

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Birds of El Triunfo Cloud Forest, Mexico, with Notes on the Horned l irdsOf ElTriunfo Cloud Forest, :vlexco, notos on the Horned GUan and other species heodore•d, Parker, III•; {te•en'HilO•, andMarA RobLim• "?, it is likely that many ,f t,ese •endem•cx.w•,, bccon.eenaanoerea if stepsare ot taken " '": ' Fig. 1. Rugged terrain near El Triunfo. View to NE from above settlement. Photo/S. Hilty. As the cloud forests of Mexico and Central elfin woodland that characterizesthe exposedridge America rapidly disappear,the needfor preserving crestsabove 1900 meters.While the understoryof remainingareas and documentingthe abundance the forest is rather sparse in most places,dense and ecologyof residentspecies becomes increasing- thicketsof secondarygrowth border the settlement ly important. The Sierra Madre de Chiapas of clearingand make hiking along the ridgesdifficult. southernMexico should be of particularinterest to During the mild dry seasonwhich extends from conservationists because of the extensive humid December to early May densefog settlesin over the montanewoodlands that remainthere, particularly area on most afternoons, leaving the shaded on the Pacificslope between 1500 and 2500 meters recessesof the forest cool and quite damp. For a (SubtropicalZone). The endangeredHorned Guan more detaileddescription of the habitats in the El and little known Azure-rumped Tanager dwell Triunfo area seeAndde (op. cit.). We should also exclusivelyhere and in the highlandsof adjacent mention that mixed broadleaf and coniferous Guatemala. In 1973 and 1974 we backpackedto woodlands (and pure stands of pine) occur locally one locality in this infrequentlyvisited region, and near here, but usually lower on the western and presentin the following paper a list of the bird easternslopes. Species inhabiting the coniferous specieswe found there, along with someindication zone are not dealt with in this paper. of their relative abundance, habitat preferences Twenty-eightof the sixty residentspecies that we and breedingstatus. In addition, our observations observed at El Triunfo are restricted to the forested of the Horned Guan supplementprevious work by highlands (mainly cloud forest) from southern R. Andde (1966. Horned Guan in Mexico and Mexico to Nicaragua.Considering the rapid rate of Guatemala. Condor 69: 93-109). habitat destruction in this portion of Middle El Triunfo (1800 m) is a small settlementon the America it is likely that many of these"endemics" trail acrossthe Sierra Madre betweenMapastepec (indicated by boldface type in the systematiclist) and Finca Prusia, Chiapas, Mexico. Situated near will ultimately becomeendangered if stepsare not the crest of the Sierra some fifty kilometers northeast of the Pacific Ocean, the cloud forest here is remote and, at present, relatively un- ' 521 N. PresidentAve., Lancaster,Pennsylvania 17603 disturbed (Figure 1). Unusually tall, epiphyte- 2 Department of Ecology and Evolutionary Biology, laden trees grow in profusion on the slopesand in University of Arizona, Tucson, Arizona 8572 I the valleys.This primary forest alternateswith an s 941 W. 2nd, Maryville, Missouri 64111 Volume 30, Number 4 779 taken to permanentlypreserve suitable forest like that of El Triunfo. The datesof our visitswere as follows: April ! 8- 22, 1973(T. Parker, M. Robbins,J. Greenberg,D. Hayward) and May 30 to June2, 1974(S. Hilty, M. Robbins, M. Barnhill, D. Cook, A. Mack, H. Morrin). During the April sojournfifteen speciesof North American migrants were noted including an interestingmixture of eastern and western wood warblers. Also, one bird of the coniferous forests nearby (Red-tailed Hawk) and three speciesof tropical birds that probably do not breed in the immediatearea wereseen flying overthe settlement clearing(Figure 2). Theseare listedas visitants. All of the birds in the lists that follow were seen within one mile of the clearing between 1700 and 2000 Fig. 2. Forestbordering the settlement. Photo/T. Parker. meters. SYSTEMATIC LIST OF BIRD SPECIES MagnificentHummingbird, Eugenes fuigens U, f Sparkling-tailedHummingbird, Tiimaturadupon- tii R, sg Key to observed relative abundance: Common, seen or heard frequently every day; Wine-lhroaledHummingbird, Atthis eilioti U, sg ResplendenlQuelzal, Pharomachrusmocinno U, f FC- Fairly Common, seenor heard every day but not in numbers; U--Uncommon, not recorded Mounlain Trogon, Trogon mexicanusC, f every day; R- Rare, encountered less than three ElegantTrogon, Trogonelegans R, f (resident?) times. Blue-lhroaledMolmol, Aspathagularis FC, f, ** EmeraldToucanet, Aulacorhynchus prasinus FC, Indication of habitat preference: f-primary f forest: sg-secondarygrowth at the forest edge Acorn Woodpecker,Melanerpes formicivorus U, f around the clearing. (edge) Indication of breeding (nests or stub-tailed Hairy Woodpecker,Dendrocopos viiiosus U, f young found): *- in April; **- in June. Spotted Woodcreeper, Xiphorhynchus erythropygiusR, f (ridges) RESIDENTS 4 Spot-crownedWoodcreeper, Lepidocolaptes af- finis C,f, *(figure 3) While-breasled Hawk, Accipiter striatus Scaly-throated Foliage-gleaner,Anabacerthia chionogaster R, f variegaticeps FC, f Black Penelopinaor Highland Guan, Penelopina RuddyFoliage-gleaner, Automolus rubiginosus R, nigra FC, f f Horned Guan, Oreophasisderbianus R, f,* Tawny-throatedLeafscraper, Sclerurus mexicanus Singing Quail, Dactyiortyx thoracicusFC, f FC, f, ** Band-tailedPigeon, ColurnbafasciataFC, f ScaledAntpitta, Grailariaguatirnalensis R, f While-facedQuail-Dove, Geotrygonaibifacies C,f Rose-throatedBecard. Piatypsaris aglaiae FC, f BarredParakeet, Boiborhynchus iineola U (April), (edge), *,** f YellowishFlycatcher, Ernpidonaxflavescens FC, Fulvous Owl, Strixfuivescens FC, f Violet Sabrewing, Carnpylopterushernileucurus Tufted Flycatcher,Mitrephanes phaeocercus C, f, FC, f sg, *,** Green Violet-ear,Colibri thalassinusC, sg Paltry Tyrannulet, Tyranniscusvilissimus FC, f Amelhysl-lhroaled Hummingbird, Larnpornis (edge). sg,*,** arnethystinusFC, sg Black-cappedSwallow, Notiochelidon IMieata FC Green-lhroaled Mounlain-gem, Lampornis (aerial) viridipallensFC, f-sg Unieolored.lay, Aphelocomaunicoior R, f Garnel-lhroaled Hummingbird, Larnprolaima Blaek-lhroaled.lay, Cyanolycapumiio U, f rharni FC, f (ridges) Rufous-browedWren, Trogiodytesrufociliatus C, 4 Names conform largely to Eisenmann, E. 1955. The f, sg Speciesof Middle American Birds. Trans. Linn. Soc. Gray-breasted Wood-Wren, Henicorhina N.Y. 7:1-128. ieucopho'sC, f 780 AmericanBirds, August, 1976 Blue-and-white Mockingbird, Melanotis (Note: In the humid forest below El Triunfo hypoleucusU, sg (1000-1500m) to the west, along the trail to Clay-coloredRobin, Turdus grayi U (April), C Mapastepec, we encountered a number of ad- (June), sg (resident?) ditional speciesthat apparentlydo not occur (at Mountain Robin, Turdusplebejus U, f (ridges) least regularly) above 1600 meters. Most of these Black Robin Turdusinfuscatus C, f, sg,* are characteristicof the Upper Tropical Zone Brown-backed Solitaire, Myadestes obscurusC, woodlandshere. A partial list includesCrested f,* Guan(Penelopepurpurascens), Rufous Sabrewing SpottedNightingale-Thrush, Catharus dryas FC, f (Campylopterus rufus), Emerald-chinnedHum- (ravines) mingbird(Abeillia abeilleO,Gray-collared Becard Ruddy-capped Nightingale-Thrush, Catharus ( Pachyramphus major), Rufous-and-white Wren œrantzii FC, f ( Thryothorus rufalbus), White-throated Robin Gray Silky-flycatcher,Ptilogonys cinereus C, f ( Turdus assimilis), Azure-rumped Tanager Cinnamon-bellied Flower-piercer, Diglossa ( Tangara cabanisi), White-winged Tanager baritula U, sg (Piranga !eucoptera) and White-cared Ground- Crescent-chestedWarbler, Vermivorasuperciliosa Sparrow(Melozone leucotis). Some of thesemay U, f (ridges) occurat El Triunfo from time to time.) Slate-throatedRedstart, Myioborus miniatus C, f, sg, ** MIGRANTS (All observedin April;most seen in Golden-browedWarbler, Basileuterusbelli C, f, *, ** secondgrowth) Blue-crownedChlorophonia, Chlorophonia oc- Olive-sidedFlycatcher, Contopus borealis U cipitalis U, f, ** Contopusspp. (Wood Pewee)U HepaticTanager, Pirangaflava U, f Empidonaxspp. (probably Least Flycatcher) Hame-colored Tanager, Piranga bidentata FC, f R Common Bush-Tanager, Chlorospingus Hermit Thrush, Catharusguttatus U optfialmicus C, f,** SwainsoWsThrush, Catharus ustulatus C YellowGrosbeak, Pheucticus chrysopeplus C, sg,* CedarWaxwing, Bombycilla cedrorum C Hooded Grosbeak, Hesperiphona abeillei FC, f TennesseeWarbler, Vermivora peregrina C (edge) NashvilleWarbler, Vermivora ruficapilla FC Black-headedSiskin, Spinus notatus C (April),sg, Townsend'sWarbler, Dendroica townsendiC f Black-throated Green Warbler, Dendroica Yellow-throatedBrush-Finch, A tlapetesgutturalis virens R U, sg BlackburnianWarbler, Dendroicafusca (one Chestnut-capped Brush-Finch, A tlapetes male, April 22) brunneinuchaFC, f, ** Northern Waterthrush,Seiurus noveboracen- Rufous-collaredSparrow, Zonotrichia capensis C, sis U sg MacGillivray'sWarbler, Oporornis tolmiei R Wilson'sWarbler, Wilsonia pusilia C Dickcissel,Spiza americana (one male, April 18) VISITANTS Red-tailed Hawk, Buteojamaicensis Green Parakeet, Aratinga holochlora White-collared Swift, Streptoprocnezonaris Vaux's Swift, Chaetura vauxi SPECIES ACCOUNTS Black Penelopina or Highland Guan, Penelopinanigra. This speciesis still relatively commonin theforest within a fewhundred yards of the settlement(see Andde, op. cit.). We en- countered groups of three to five individuals in Fig. 3. Spot-crownedWoodcreeper (Lepidocolaptes both April and June, but their characteristic affinis).Photo/S. Hilty. ascendingwhistled
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