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THE OCCURRENCE AND STATUS OF THE HORNED IN THE WESTERN UNITED STATES

WAYNE HOFFMAN, Departmentof Zoology,Oregon State University, Corvallis, Oregon 97331 WILLIAM P. ELLIOTT, Air ResourcesLaboratories--R32, National Oceanicand AtmosphericAdministration, 8060 13th Street,Silver Spring, Maryland 20910 J. MICHAEL SCOTT, P.O. Box 44, Hawaii National Park, Hawaii 96718

The (Fratercula corniculata) breeds in northeastern , throughout the BeringSea, on the Aleutian Islandsand along the south east to Glacier Bay and Forrester Island (AOU 1957). This publicationlists the as a winter visitor to Washington and Oregonand casualto . They are only occasionallyseen south of the Queen Charlotte Islands,, in any season (AOU 1957, Jewerr et al. 1958, Gabrielson and Jewerr 1940). Thus, considerableinterest was arousedwhen 1973 producedsight- ingsof 10 separatebirds along the WestCoast of the United Statesand one near Victoria, British Columbia. Three were seen in southern Californiain May. June producedtwo recordsfrom centralCalifornia and one each in Oregon and Victoria, B.C., and July showedtwo more birds in California and two more off Oregon. All but one record(July, Farallon Islands) were of live birds and most of these were seen from boat trips. The June record from Oregon was of a summerplumage bird seen sitting alone on a rock near Newport; it was seenbetween 0600 and 0630 on two consecutivedays and flew off to sea both times.

SPATIAL DISTRIBUTION

These sightingswere obviouslynot winter visitors and we were prompted to examine the reported occurrencesof Horned Puffin along the West Coast. Table 1 givesa list of all sightingsknown to us along the coastof North Americasouth of the 49th parallel. There are 41 entriesin Table 1; 24 from California,10 from Oregon, 5 from Washingtonand 2 from Victoria. The California observations are mainly from Point Conceptionto Point Reyes(17) with 2 from a- roundHumboldt Bay and 5 from southernCalifornia. Except for south- ern California,this distributionis consistentwith presumeddistribution of observers:thus, Horned seemless likely to be found south of Point Conceptionthan north of there. Exceptfor an unusualobserva- tion of a live bird found at Coulee City, Washington(Larrison and Sonnenberg1968) which is 225 km from the nearestsalt water, all birds were seen on the coast or from boats at sea.

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Two entries deservespecial mention. Alcorn (1959) reports 70 HornedPuffins dead on the beachnear Westport, Washington on 1 April 1959 and Gabrielsonand Jewett (1940) report "hundreds"washed up on the Oregonbeaches from the end of December1932 throughthe middle of February 1933. In both of these eventslarge numbersof Tufted Puffins (Lunda cirrbata) were found also and in 1932-33 Para- keet Auklets (Cyclorrbyncbuspsittacula), Ancient Murrelets (Syntbh- borbampbusantiquus) and Black-leggedKittiwakes (Rissa tridactyla) were also recordedin exceptionalnumbers. These occurrencesmay haveresulted from major failuresof the birds' food supply in the nor- mal winteringareas. Other than thesespecial occurrences the records are mostly of individual birds.

TEMPORAL DISTRIBUTION

The distribution in time of occurrences of Horned Puffins, as shown in Table 1, requiresmore discussion.The bird wasreported in 3 of the 6 from 1914 through 1919; was unreportedfrom 1920-1928; found in 3 of the 5 years, 1929-1933; and unreportedfor the 19- period, 1934-1952. Sightings.werethen reportedin 12 of the 21 years, 1953-1973. Althoughwe haveexamined only the data through1973, we understandthere have been sightingsin both 1974 and 1975. In- cludingthese years then, HornedPuffins have been reported in 8 of the last 10 years;only 1970 and 1972 havefailed to producesightings. There was a slighttendency for multipleoccurrence in thoseyears whenthe bird wassighted. In 9 of the 17 yearsof reportedoccurrences, more than one bird was found. The years1919, 1933, 1959 and 1973 might be termed "invasion" years;in eachof theseyears, more than 10 birdswere reported, whereas no morethan 4 werereported in any other year. It is quite probablethat the recent increasein sightingsresults from an increasein the numberof observers,particularly since off-shore boat trips are becomingmore popular. Low numbersof observersmay have contributedto the 9-year gap between1920-28, but it seemsless likely the explanationfor the 19-yeargap, 1934-52. Furthermore,there appearsto havebeen a distinctshift in the season- al occurrencebetween the 1914-1933 periodand the 1953-1973 period. In the earlier period (counting the 1932-33 washupon the Oregon beachesas 3 separateoccurrences in late December,January and Feb- ruary) 13 of the 16 sightingswere in the cold season,late December through March, whereasin the more recentperiod, 20 of 26 sightings were in the monthsMay-August, 4 werein January-Februaryand one eachwas in Novemberand April. (The April sightingwas made about 225 km from land off the Washingtoncoast and the only other April recordis of 70 deadbirds on 1 April, whichcould be ascribedto March. 90 HORNED PUFFIN

The Novemberrecord is of a long-deadbird on the Oregoncoast and is the only recordwe found betweenthe end of Augustand the end of December). On the basisof theserecords it can be arguedthat Horned Puffinschanged their patternbetween these periods and are now sum- mer visitors to the West Coast. This hypothesisneeds further examination,however. An argument could be made that a few Horned Puffins are well off-shore in all seasons except fall. Winter occurrencesof beachedbirds are more likely than summerones becausewinter is the seasonof most frequent storms whichcould disable the birdsand washthem up. Furthermore,many of the recentsummer sightings are from boatsand it is certainlytrue that off-shoretrips are muchmore frequent in the warmseason and in recent years. This argument(which doesnot explainthe 19-yearhiatus) is not supported,however, by the recordsof deadbirds or live birdsknown to have been seen on the mainland. All the records in the 1919-1933 period were of deador dyingbirds. (The first recordof a bird not dead or dying is from August 1964.) Since 1953 only 4 recordsof dead birds have been from the cold season,and thesewere all prior to 1960, whereas there are 8 records of dead birds and 2 of live birds on the mainlandsince 1953. Thus,a changein patternof behaviordoes seem to have occurred. If the patternof occurrencesshown in Table1, mainly winter records 1914-1933, absence1934-1957, mainly summer records 1953-1973, is truly representativeof the HornedPuffin's behavior, what hascaused the change?We do not havea definiteanswer but it is certainlypossible that it lies in changesin the climateand the oceans. Oceanographers and meteorologistsare beginningto recognizeanomalies in oceanic temperaturesand atmosphericcirculations (e.g., Namias1969) that may last for a decade or more. Wickett (1967) has discussedthe effects of large-scaledisturbances in the atmosphere-oceansystem on the bio- logicalprocesses in the North Pacific. It is quite possiblethat F. corni- culatais respondingto somesuch change. The problemdeserves further attention; anomalousbehavior of the oceansand atmosphereshould be consideredby studentsof the distributionof marinebirds.

ORIGIN OF WEST COAST BIRDS

One final point remainsto be discussedhere-where do the Horned Puffins on the West Coast come from? Grinnell(1938) hypothesizedthat the birdsfound southof Canada were carcassesof birds that died or becameincapacitated in the north and whose bodies were carried south by oceancurrents. Apart from the problem of carcassesremaining intact long enoughto make the journey to southernCalifornia, the oceancirculation does not provide 91 HORNED PUFFIN currents flowing in the proper direction. There is a broad eastward flowing current (the North PacificCurrent) south of the Alehtian Islands which dividesnear the Washingtoncoast. The northernbranch flows northward along the British Columbia-Alaskacoast and the southern half flowssouth becoming the CaliforniaCurrent. Unlessa bird wassuf- ficiently far south, i.e. below the U.S.-Canadaborder, it would not be carriedinto U.S. waters. Furthermore,the near-shorecirculation along the northernCalifornia-Oregon-Washington coast is to the north in win- ter. Thus, to be washedup on the WestCoast, the birdswould haveto be fairly far southin the first placeand in the correctseason. It is tempting to assumethe West Coast birds comefrom the breed- ing coloniesin southeastAlaska. Sealyand Nelson(1973) discussbrief- ly the probable origin of the Horned Puffins found in the Queen Charlotte Islandsand other British Columbialocations. They feel the summer birds are likely to be wanderersfrom the Alaskanbreeding colonieson ForresterIsland but point out that the birdsfound further south need not come from there, particularlyin springand winter. Cer- tainly the birds found off our coastin springand early summerare not post-breedingwanderers. Theseauthors point out our lack of knowledgeof the bird'swintering habits. They cite someauthors who feel the HornedPuffin doesnot migrateand is never found far from land and otherswho report winter- ing birds well off-shore. Thus, Hamilton (1958) observed"scattered individualsof the speciesover a wide area acrossthe Pacific" between latitudes 40* and 48* N. M.T. Myres (pers. comm.) indicates that Horned Puffins are occasionallyseen at Ocean Weather Station "P" (50* N, 145' W) and H. Oji (pers.comm.) found HornedPuffins, as well as Thick-billedMurres ( lornvia)wintering in numberswell southof the Aleutians in the western North Pacific. Further evidence for occa- sional wide dispersalis found in Clapp and Woodward(1968) who re- ported about 35 Horned Puffins beached on the Leeward Islands of Hawaii betweenJanuary and March 1963. Theseobservations, together with the fact that the congenericCommon Puffin (F. arctica) of the North Atlantic is consideredthe most pelagicof the Atlantic alcids (Tuck 1961), suggestthat F. corniculatamay well winter over a wide latitude rangein the Pacific. Thus, there are likely to be a numberof birds wintering at the latitudes of the West Coastand it is, therefore, quite possiblethat our birds are wind blown, non-breedingadults from the central North Pacific. Some other evidencefor the use of a route from the Bering Sea- central Aleutians area to the West Coast can be found in the extralimital dispersalof the Red-leggedKittiwake (Rissabrevirostris) and the above- mentioned Thick-billed Murre. The kittiwake breeds on the Koman- dorskieand Pribilof islandsand normallywinters in the adjacentwaters

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(AOU 1957). However,of four publishedextralimital records, three are frorri• Oregonbeaches (Gabrielson and Jewett 1949, Munro 1953, Walker 1955). Another sightingwas reportedfrom the Washington coastduring the winter of 1973-74. In recentyears, Thick-billed Murres have been found severaltimes off the coastsof California and Oregon (Yadon 1970, Scott and Nehls 1974). Since neitherbird is apparently known in southeastAlaska, they presumablycome from the open Pac- ific as the Horned Puffin may do.

SUMMARY

The Horned Puffin is now a late springand early summervisitor to the WestCoast of the U.S., appearingsometimes as far southas southern California,whereas previously it wasconsidered only a winter visitor. It still may appearoccasionally in winter. The apparentshift of behavior since 1953 may be the result of long term shifts in the atmosphere- ocean circulations but we do not have sufficient data to confirm this now. We alsofeel it is possiblethat the birds off the West Coastmay come from the Aleutian-BeringSea population rather than southeast Alaska.

ACKNOWLEDGMENTS

We would like to thank Harry Nehls, Terry Wahl and especially Alan Baldridgeand Guy McCaskiefor their many valuablecomments. McCaskiealso assistedin the compilationof the old Californiarecords. Of course,any errors or illogic remainingare entirely our own. This is Contribution 47 of the BehavioralEcology Laboratory, OregonState University.

LITERATURE CITED

Alcorn, G. 1959. Puffinson the south Gray's Harbor beaches.Murrelet 40:21. American Ornithologists'Union. 1957. Check-listof North Americanbirds. 5th ed. Am. Ornithol. Union, Baltimore, Md. Clapp, R. B. and P. W. Woodward. 1968. New recordsof birds from the Hawaiian Leeward Island• Proc. U.S. Natl. Mus. 124(3640):1-39. Gabrielson,I. N. and S. G. Jewett. 1940. Birdsof Oregon. OregonState College, Corvallis,Oregon. Grinnell, J. 1938. Ocean waifs and what they mean for distribution. Condor 40: 242- 245. Grinnell, J. and A. H. Miller. 1944. The distribution of the birds of California. Pac. Coast Avif. 27. Hamilton, W. J. III. 1958. Pelagicbirds observedon a North Pacificcrossing. Condor 60:159-164.

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Jewett, S. G., W. P. Taylor, W. T. Shaw and J. W. Aldrich. 1953. Birds of Wash- ington State. Univ. WashingtonPress, Seattle. Larrison, E. J. and K. G. Sonnenberg. 1968. Washingtonbirds, their location and identification. SeattleAudubon Society, Seattle. Munro, J.A. 1953. Red-leggedKittiwake in Oregon. Murrelet 34:48. Munro, J. A. 1957. Observationsof the winter waterfowl populationsat Morro Bay, California. Murrelet 38:9-25. Namias, J. 1969. Seasonal interactions between the North Pacific Ocean and the atmosphereduring the 1960's. Mon. Wea. Rev. 97:173-192. Sanger,G. A. 1972. Checklist of bird observationsfrom the easternNorth Pacific Ocean. Murrelet 53:16-21. Scott, J. M. and H. B. Nehls. 1974. First Oregonrecords for Thick-billed Murre. West. Birds 5:137. Sealy, S. G. and R. W. Nelson. 1973. The occurrencesand statusof the Horned Puffin in British Columbia. Syesis6:51-55. Tuck, L. 1961. The tourres,their distribution,populations and biology: a study of the genusUria. CanadianWildlife Ser. No. 1, Ottawa. Walker, A. 1955. Unusualbird recordsfor westernOregon. Murrelet 36:29. Wickett, W. P. 1967. Ekman transport and concentrationin the North Pacific Ocean. J. . Res. Bd. Canada 24:581-594. ¾adon, V. L. 1970. Four Thick-billed Murre recordsfor Monterey Bay. Calif. Birds 1:107-110.

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