SCIENCE distancefrom whichit wasphoto- graphedusing a MinoltaxGicamera with a Makinon 80-200 mm zoom lens (FigureI). Judgingfrom its SIGHTRECORD OF plumageand behavior, it seemedto bein goodcondition. The kittiwake remainedon therocks preening for about ten minutes, but when some BLACK-LEGGED fishwere thrown toward the rocks by fishermen, the took off and madeattempts to feedon them.In KITTIWAKEINPERU flight, the spreadwings allowed a closerlook at the flightfeathers, of which the primariesshowed some wear.Overall, the bird'splumage byB.J. M. Haase showed most characteristics of an adult.However, the presence of gray patchesand spots on the head suggest that it mightbe eitheran adultre- tainingsome features of the winter plumageor a subadultin nearlycom- During a studyof Peruviancoastal tips.The whitehead, body, rump, pletedbreeding . birdsin I987, I stayedat the rocky andtail, and the distinctively formed, The Black-leggedKittiwakc has coastofPucusana (IZ ø 3o's, 76o 4o'w), straw-coloredbill.immediately made a circumpolardistribution in the 60 kilometers southeast of Lima. On me realize that this bird was a Black- NorthernHemisphere (Voous I96O), themorning of JulyIO, whileI was leggedKittiwake (Rissa tridactyla). andsince the early t97os has extend- observingthe resident species under When it landed on the rocks, the edits breeding range in bothnorther- thecalm weather conditions prevail- relativelyshort, brownish-black legs ly andsoutherly directions by estab- ingin thearea, a passing drew my andfeet were seen. At closerange, lishment of new colonies on both attention. It was much smaller than foursmall gray spots were visible on sidesof the (Nettle- the commonlyoccurring Band- eachside of the head, just behind and shipand Lock i974, Rodriguez Silvar tailedGull (Larusbelchen) and Gray abovethe eye,and therewas also a and BermejoDiaz I975).These ex- Gull (L. modestus).The back and vaguelight-gray ear patch. tensionsin rangeseem to bethe result wingswere uniformly gray, the latter The birdwas not shy and could be of a dramaticincrease in numbers,at withsharply defined, all-black wing- approachedto withinfive meters, a leastin Atlanticpopulations (Cramp

Black-leggedKittlwake on Peruviancoast.

382-American , Fall 1993 and StmmonsI98Z ). At the same nine, the numberof sightrecords 1994 outsidethe species' normal range has alsoincreased (Brooks and Sinclair P.O.BOX 196 I BIRDING I979, Hazevoeti985, P. Harrison in htt.).According to Harrison(I985), PLANETARIUMNEW YORK,STAT,ON NY •-. TOURS theBlack-legged Kittiwake is absent 10024U,S,A, • / NORTHWEST INDIA m the Pacific Ocean below 2oøN. Rajasthan,Gujarat, U.R 7-31 January Thus,the sighting of thisspecies at Pucusana constitutes the first record (212)866-7923/•/'• SRI LANKA "thegreatest • 31 January-16 February forSouth America. It canonly be pre- operatorof • sumedthat the origin of thebird lies ornithological THAILAND •n the North Pacific,but this cannot to.ron,The NW, Central, South 8-31 January be confirmedby eitherthe observa- Arthurearth" /l /• ..... Asia nonsmade or thephotographs tak- VIETNAM en.Although subspecific differences Specialists North/South /// .Write•or 1 February-5 March have been described for Pacific and /;// itineraries Atlantic Black-leggedKittiwakes PHILIPPINES Luzon/Mindanao (Crampand Simmons I982, Harri- 21 July-13August Palawan/Bohol/Cebu sonI985), Sluys (I982), in hisstudy INDONESIA 4 March-4 April on thegeographical variation of the Java, Bali, Sumatra, Borneo TIBET/WEST CHINA 15 July-7 August speciesworldwide, states that due to Sichuan (Szechwan) the overlapin measurementsit ap- 1993 BIRDING TOUR 6-30 May pearsimpossible to distinguishbe- SOUTH CHINA MANCHURIA tween Pacific and Atlantic birds. Pheasants & Cranes INNER MONGOLIA 11 December-3 January Acknowledgements 29 May-23 June I wouldlike to thankD. N. Nettleshipand Chr. Smeenk for their comments on an earli- er draft of this article.

Literature Cited: BROOKE, R. K. andJ.C. SINCLAIR. Z979. NEW!AviSys 3.0 NEW! Preliminarylist of southernAfrican sea- The LeadingSoftware for NorthAmerica and Occasional World Birders birds.Cormorant 4:zo-• 7. A programmingbreakthrough allows us to include the complete checklists ofthe 63 states and CRAMP, S. andK. E. L. S•4•4oNs (Eds.). provinces,fully integrated with reports, and with no impact on our legendary speed, power and •98z. The birdsof theWestern Palearctic, usability.Plus we've added more powerful capabilities. Read what the experts said about VolumeIII. OxfordUniversity Press, Ox- AviSys2.0: "...an elegant method for storing, processing, and presenting a vast amount of ford. fielddata...so easy that keeping detailed and accurate records isnot a chore,but is actually HARRISON,P. I985. Seabirdsof theworld: fun...reportsarepowerful and flexible...you cando no better than AviSys." Birding Mag. 8/92 an identificationguide. (Revised edition) Checkthe following AviSys exclusive features! Beckenham. •* 420Geographic Lists: sites, cities, counties, states, nations, continents, customized to HAZœVOœT,C.J. •985. Birdrecords from yourneeds, and all automatically updated with the keystroke that assigns a sighting. Mauretaniain December•974. Dutch •* FullABA N.A. Checklist, plus State/Province Checklists--easy toadd, split, lump, edit Birding7:z7-z8. Allchecklists fully integrated with screen, report, query, and spreadsheet facilities. •* CustomChecklists on-line for counties, NWR's, NP's, species group studies, etc. NETtLESniP, D. N. and A. R. LOCK. •* TheFastest, Easiest and Most Flexible sighting data entry--just check off the birds. z974. Black-leggedKittiwakes breeding in Labrador.Auk 9•:•73-•74. Findspecies with scrolling, paging, Hot Keys, name fragments, band codes. •* FieldNotes for sightings and sites; for sighting detail, maps, studies, etc. RODRigUEZ SILVAR,J.andA. B•UM•JO •* UnlimitedReporting and Listing by date range, geography, species, habitat, behavior, DZASD• RAgAgO.•975' Primeranidifi- cacion de la Gaviota Tridactila Rissa tri- nestingstatus, sex, heard-only, photographed, weather, key words, codes, etc. dac•ylaen el suroestede Europa.Ardeola •* CensusSpreadsheets forpopulation, sighting frequency, CBC, and ornithology studies zi:4o9-414. •* Powerfulfill-in-the-blanks data query, listing, spreadsheet, and reporting facilities. •* TripLogs; query by date range, location, party members, trip type, habitat, etc. S•u¾s,R. •98z. Geographicalvariation of theKittiwake. Ger•ut 72:22z-23o. •* Intelligentdata export to 123, dBASE, PC-File, WPerfect, etc.; a mustfor professionals Fororders or info,call 1-800-354-7755- 24 hours- MCNISA - $89.95 Voous, K. H. •96o. Atlas of European $4.00S&H - WAres. 8% tax- 640K IBM compat. - diskette or harddrive birds.Nelson, London. 60 daymoney back guarantee- Perceptive Systems, PO Box 3530, Silverdale, WA 98383 Fastas a Falcon.Powerful as an Eagle. Friendlyas a Chickadee --Casillaz44o, CuenoB,Ecuador

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