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fNewThisFall.The Great Gray OwlPhantomof the NorthernA SmithsonianROBERTNatureForestBookW. NEROPhotography by Robert R. TaylorIn this definitive study of the natural history of theGreat Gray Owl (Strix nebulosa), Robert Nero givesfirst-hand descriptions of hunting, courtship, andnesting behavior previously unrecorded. It is also ahighly personalizedaccount of the author's feelingsabout observingand working with this beautiful bird ofcompelling appearance and behavior. A large numberof masterful photographsin color and black and whitevividly show Great Gray Owls from nesting throughwinter foraging, and bring the spirit of this bird toreadersthrough every seasonof the year.Robert Nero, currently a wildlife specialist with the Manitoba Department ofNatural Resources,has written extensively on natural history subjects. RobertTaylor is a free-lancephotographerwhosephotographshave appearedin numerousmagazines,books, and newspapers.September/168pp/57 b&w, 30 color illus./7 x 10/ISBN 0-87474-672-8/ 17.50(prob.) clothMigrant Birds in the NeotropicsEcology, Behavior, Distribution and ConservationFifth book in the Symposiaof the National Zoological Park seriesALLEN KEAST and EUGENE S. MORTON,EditorsAnnually millionsof North Americanmigratorybirdsconvergeon the tropics.Howare they accommodatedinto areasthat are alreadythe world's most speciesrich?How do they divideliving space?What do theyeat?How to theyinteractwith eachother in thesesouthernwintering grounds?Why do they go to specificlocalitiesinsteadof just diffusingrandomlyover the tropical latitudes?How did the wholepattern of migration arise? Should we continueto take thesemigrants for granted, orare they in danger?Theseand other equallyintriguingquestionsare addressedinthis book, which containsoriginal researchby nearly every authority working todayon New World tropical avian ecology.Allen Keast is professor of biology at Queen's University, Kingston, Ontario,Canada. Eugene Morton is researchzoologist at the National Zoological Park,SmithsonianInstitution.August/576pp./8 V2x 11/33 b&wphotos,169figs.,138tables/1SBN0-87474-661-2/ 15.00paperISBN 0-87474-660-4/ 27.50 clothTo order, or further information, write to:Smithsonian Institution Press, 1111 N. Capitol St., Washington, D.C. 20560 orcall:(202)357-1793 SmithsonianInstitutionPress
Handbookof the Birdsof Europe,The Middle East,and North AfricaVolume I1: Hawks to BustardsEditedby STANLEY CRAMP, K. E. L. SIMMONS, and others.From reviews of VolumeI:' treasuretrove of knowledge,and majoradditionto nBirds.'9 delightto use. The westernPalearctichandbookshouldbeof interestto anScientist."Should be a useful reference work for decades .An excel-lent,authoritativework."- LibraryJournal."Thisisa magnificentvolume." Choice."Thisvolumewill, deservedly,havea verywideappeal." TheQuarterlyReviewofBiology.The secondvolumeof thisindispensablehandbookcontainsdescriptionsof 97 species.Eachspeciesis fully describedwith sectionson field characteristics,habitat, distribution,mortalityand longevity,and population(with maps showingbreedingand winteringareas),socialpatternandbehavior,breeding, food, voice, plumages,moults, measurements,weights,structure,and tethe species.Volume I1: Hawks to Bustards1980702pp.;300linedrawings;56colorplates 85.00Volume I: Ostrich to Ducks1978732pp.;350linedrawings;72colorplates 85.00A CompleteChecklistofthe Birds of the WorldRICHARD HOWARD and ALICK MOORE, Trustees of the bookforboththeprofessionaland amateurornithologistcontainsan up-to-dateand accuratelist of thebirdsof theworlddownto the subspecificlevel.It includesthe geographical distributionof eachsubspeciesas well as the commonname wherepossible,in orderto increaseawarenessof thetaxonomicsystemof orders,families,genera,species,and subspecieswhichtheauthorsbelieveessential for a betterunderstandingof the studyof birds.1980550pp. XFORDUNIVERSITYPRESS200 Madison Avenue, New York, N.Y. 10016
BehavioralMechanismsin EcologyDouglass H. Morse"This synthesisand integrationof behavioralecologyinto a unifiedframeworkwill. proveextremelyvaluableto manyevolutionaryand ecologically-orientedbiologists,aswell asto any seriousstudentof animalbiology.The clear,uncomplicatedstyleof thewritingwillassureits accessibilityto any educatedreader."106 line illus. 25.00 --Richard T. Holmes,DartmouthUniversityNow in paper--The Behavior of CommunicatingAn EthologicalApproachW. John Smith"Thisis clearlyan importantbook,. original,provocativeandstampedwith the author'shighlypersonalapproachto the subject." 7.95,paper; 22.50,cloth--JournalofAnimalEcologyHarvard University PressCambridge,Mass.02138THEISLANDWATERFOWLIn this reference book, Dr. Milton W. Weller studies conditions forthose birds which are isolated on remote islands and their ways ofadaptation to reduced mobility, different food sources, modified competition for resources, and severe climatic conditions. Weller's re-search provides clues to the function of common biologicalcharactersof continental waterfowl otherwise taken for granted.His observationsof their ecology,breeding,biology,and behaviorhelp us to understand problemsof habitat use, island biography,food exploration, avian socialsystems, and conservation.lg80, 122pp., ill., 10. 5Please add 1 per book for mailing-%.IOWA STATEUNIVERSITYPRESSDept. WF1, South State AvenueAmes, Iowa 50010'
Breeding Biologyof the EgyptianPlover,PluvianusAegyptiusThomas R. HowellA detailedand imaginativeapproachto studyingthe biologyof thisuniquespecies.Theauthor appliescarefulobservationand quantitativetechniquesto a fascinatingnaturalhistory--a naturalhistoryheretoforeconfusedby inaccuracies. 10.50paper, illustrated. HowardL.CogswellßI W!!lustrationsbyGeneChristmanAn informative book . useful and well-done .The book iswellworthitsprice."--AmericanScientist"An outstandingbird book whichwill proveto be a mustfor boththe amateurand professionalornithologist."--PacificDiscovery /' . --. 12.95cloth, 5.95paper,illustrated'"'PUBLICATIONSOF THECaliforniaPresBerkeley 94720AMERICANORNITHOLOGISTS'UNIONCheck-list of North American Birds. Fifth Ed. 1957 (reprinted 1975). C10thb0und, 691 pages, 15.00 (includes32nd Supplement, 1973, and 33rd Supplement, i976). Supplementssold separately'at 1.50 each.Proceedings of the 13th International Ornithological Congress. 1963. Two volumes, 1,250pages,clothbound, 10.00 per two-volume set. (The best literature buy in ornithology.--G.E.W.!)Report of The American Ornithologists' Union ad hoc Committee on Scientific and Educational Use of Wild Birds. Supplement,Auk 92, No. 3, July 1975, 1.00 each.Bird Collections in United States and Canada. Auk 90, No. 1, January 1973 (addendaandcorrigendaAuk 93, No. 1, January 1976 included), 1.50 each.Career Opportunitiesin Ornithology(1974, American Birds 28: 741-746). Single copies freefrom the Secretaryof the AOU. Includestamped,addressedenvelope.Order multiplecopiesfrom Assistant to the Treasurer, AOU. Five copies, 1.00.Prepaid orders (including a 0.50 handling charge per order) should be placed with GlenWoolfenden, Assistant to the Treasurer, AOU, Department of Biology, University ofSouth Florida,Tampa, Florida33620.
THEBIRDBOOKSHOPWe can supplyany natural historybook in print; over 500 titlesin stock; worldwide service; low postagerates; post free to SOCmembers(exceptsmallorders);free 30-page booklistfrom:The Bird Bookshop, Scottish Ornithologists' Club,Dept. 4, 21 Regent Terrace, Edinburgh, EH7 5BT,Scotland'Everything for the Wild Bird Enthusiast'BOOKSin Print:FORWrite forBIRDLOVERSfree list of Books and RecordsOut of Print: Books bouõht and sold. Want listsencouraõed.You will be quoted if or when available.BushnellOptical Equipment availableat 25% discount.702 MarshallSt., Houston,Texas77006(713) 528-0139Patricia Ledlie-bookseller Box46 Buckfield.Maine04220(207) 336-2969Out of Print, Rare, & NewBird BooksAnnotatedCatalogues: 1.50ByAppointmentJUST PUBLISHEDORNITHOLOGICAL MONOGRAPHS No. 28The ForagingBehaviorof MountainBluebirdswith Emphasison SexualForagingDifferences,byHarryW. Power.x 72pp.,colorfrontispiece,12textfigures.1980.Price 8.50 ( 7.50to AOU members).
Howmanyyearswouldit specimensPERMANENTSPECIMENPRESERVATIONwith Air Tight SealFumigantCompartmentß DoubleWall Constructionß Pest-ProofandAirTightSealSkin Case#201 (illustrated)Holdslarge trays for larger specimens.ß DoublePanel Doorß Lift-OffSafeTypeHingeß FumigantCompartmentß 3-PointLockingMechanismSkin Case# 202 (not illustrated)Dividedfor half.sizetrays for smallerspecimens.ß FrontandBackAirTightSealsß rdyandeasyto ipmentCo.105 ChambersStreet, NewYorkDept. ?, N.Please send complete details on Lane Zoologyand AddressSCIENCEEQUIPMENT105 ChambersStreetCO,NewYork7, N.Y.City.7one.State
TheAukA Quarterly Journal of OrnithologyEDITORJOHN A. WIENSASSISTANT EDITORJEAN FERNERASSOCIATE EDITORSWALTER BOCK, HERBERT W. KALE IIVOLUMEPUBLISHED97BYTHE AMERICAN ORNITHOLOGISTS' UNION1980
DATES OF ISSUES OF "THEAUK"VOL. 97, NO. 1--14 February 1980VOL. 97, No. 2--24 April 1980VOL. 97, No. 3--15 July 1980VOL. 97, No. 4--9 December 1980
CONTENTSOF VOLUMENUMBERHISTORICAL ASPECTSWARBLERS. FrankON THE VARIABILITY971OF HYBRIDIZATIONBETWEEN BLUE-WINGEDB. Gill.IN ENERGYALLOCATIONOF NESTLINGBIRDS.ANDGOLDEN-WINGED1Er/caH. Dunn.19EVENING ROOSTING FLIGHTS OF THE HONEYCREEPERSHimatione sanguinea AND Vestiariacoccinea ON HAWAII. Richard E. MacMillen and F. Lynn Carpenter .GEOGRAPHICAL VARIATIONIN CLUTCHRobert E. Ricklefs .38PHOTOPERIODICCONTROL OF' THE MOLT CYCLE IN THE CHAF'F'INCH(Fringilla coelebs).Victor R. Dolnik and Valery M. Gavrilov.THETEMPORALRELATIONSHIP28SIZE AMONG PASSERINE BIRDS: ASHMOLE'S HYPOTHESIS.BETWEENTHECYCLEOF' TESTICULARDEVELOPMENT50ANDMOLT IN THE WHITE-CROWNEDSPARROW,Zonotrichia leucophrysgambelii. Donald S.Farner, Richard S. Donham, Michael C. Moore, and Robert A. Lewis .63SEASONALTHERMOREGULATORYADJUSTMENTSIN WHITE-CROWNED SPARROWS.Edward E.Southwick .76THE ORIGIN OF'BIRDS: STRUCTUREOF'THE TARSUSAND TEETH. L.D.and K. N. WhetstoneMartin, J. D. Stewart,.86OBSERVATIONS ON THE FORAGING ASSOCIATION ON DOUBLE-TOOTHEDKITES AND WHITE-FACEDCAPUCHINMONKEYS. Roy Fontaine.THE EFF ECT OF THE CORIOLIS FORCE ON THE FLIGHT OF A BIRD.J.B.94Tatum.BEHAVIORAND SONGSOF HYBRID PARASITICFINCHES. Robert B. Payne .EVOLUTIONARYGENETICSOF' BIRDS I. RELATIONSHIPSAMONG NORTHAMERICAN118THRUSHESAND ALLIES. John C. Avise, John C. Patton, and Charles F. Aquadro .ANALYSIS OF' HYBRIDIZATION BETWEEN THE HIRUNDINID GENERA HitundoIN TEXAS. Robert F. Martin.99135AND Petrochelidon148DIET AND BREEDING SEASONALITYAMONGA POPULATIONOF'SHARP-TAILEDMUNIAS, Lonchurastriata, IN MALAYSIA. Michael L. Avery .160NOTES ON LITTLE KNOWN BIRDS OF THE UPPER URUBAMBA VALLEY, SOUTHERN PERU.Theodore A. Parker, 111 and John P. O'Neill .167AN ALTITUDINAL CLINE IN CONDUCTANCEOF CLIFF SWALLOW(Petrochelidon pyrrhonota)EGGSTO WATER VAPOR. Paul R. Sotherland, Gary C. Parkard, TheodoreL. Taigen, andThomas J. Boardman.PREY OF THE WHITE-TAILED177KITE IN CENTRAL CHILE AND ITS RELATION TO THE HUNTINGHABITAT. RobertoP. Schlatter, BenignoToro, JosdL. Yd ez, and Fabian M. Jaksi5 .186SHORT COMMUNICATIONSTiming of Breeding and Chick Mortality in Central and Peripheral Nests of Magellanic Penguins.Michael Gochfeld .191Ontogenyof RoosttimeRestlessnessin the AmericanRobin(Turdusmigratorins). LeonardA. Eiserer 194Prey of the Harris' Hawk in Central Chile. Fabian M. Jaksid, JosgL. Yd ez, and RobertoP.Schlatter .196AggressiveDisplaysin NonbreedingCanvasbacks. William C. Alexander.198Florida ScrubJaysForagingFrom Fetal Hogs. Daniel W. Baberand John G. Morris .202Rediscoveryof Xenerpestessingularis(Furnariidae). TheodoreA. Parker, III and SusanAllen Parker 203Cocked-tailDisplayand EvasiveBehaviorof AmericanOystercatchers.LawrenceKilham .205COMMENTARY. OLD SPECIMENS AND NEW DIRECTIONS: THE MUSEUM TRADITION INCONTEMPORARyORNITHOLOGY.RobertE. Ricklefs .REVIEWS. Edited by WalterBock .BREWSTERAWARD, 1979 .NOTESANDNEWS .20620821162, 75, 176, 185
NUMBER2BEHAVIOROF THE GREY-CAPPEDSOCIALWEAVER (Pseudonigrita arnaudi) IN KENYA. NicholasE. Collias and Elsie C. Collias .RAINFALLON THE GAL ,PAGOS AND THE DEMOGRAPHY OF DARWIN'SFINCHES.213Peter R. Grantand Peter T. Boag .227ACQUISITION OF PLUMAGE POLYMORPHISMIN WHITE-THROATED SPARROWS. Carter T. Atkinsonand C. John Ralph .RANGE EXPANSION AND DIURNALCHANGES IN DISPERSION OF THE BROWN-HEADED245COWBIRD INTHE SIERRANEVADA. StephenI. Rothstein, Jared Verner, and Ernest Stevens .253THE BREEDINGBIOLOGYOF THE FORK-TAILEDSTORM-PETREL(Oceanodromafurcata). P. DeeBoerstoa,Nathaniel T. Wheelwright, Mary K. Nerini, and Eugenia StevensWheelwright.268GEOGRAPHICAL VARIATION IN THE AVIFAUNAS OF TROPICAL FOREST UNDERGROWTH.Karr .283James R.BROWN-HEADEDCOWBIRD (Molothrus ater) MORTALITY IN AN URBAN WINTER ROOST. D.M.Johnson,G. L. Stewart, M. Corley, R. Christ, J. Hagner, A. Ketterer, B. McDonnell, W.Newsom, E. Owen, and P. Samuels .A MORPHOLOGICALAPPROACH TO THE STUDY OF AVIANCOMMUNITY299ORGANIZATION.RobertE. Ricklefs and Joseph Travis .WATER DEPENDENCEOF BIRDS IN A TEMPERATE OAK WOODLAND.321Pamela L. WilliamsandWalter D. Koenig YSISOF AN OAKPeter B. Landres and James A. MacMahonWOODLAND339AVIFAUNAIN.351SEVENTEENBIRD SPECIESNEW TO PERU FROM THE PAMPASDE HEATH. Gary L. Graham,Gary R. Graves, ThomasS. Schulenberg,and John P. O'Neill .366LITTLE BLUE HERON BREEDINGBEHAVIOR. JamesA. Rodgers,Jr .371THE FORMATIONOFANTWRENFLOCKSON BARROCOLORADOISLAND,PANAMA. Judy Gradwohland RussellGreenberg.385SHORT COMMUNICATIONSNest Grouping and Productivity in the House Sparrow. W. Bruce McGillivray .396Louisiana Herons Gleaning Dragonflies. E. Scott Clark .399Aspectsof the Annual Cyclein Highland Populationsof the Rufous-collaredSparrow,Zonotrichia capensis.Paul Handford .400The Cackle Call of Female Blue Grouse: Does It Have a Mating or AggressiveFunction? Susan J.Harmon.404First Records of the Spotted Rail (Pardicallusmaculatus) on the Island of Hispaniola. Annabelle Stockton Dod.407A Nest of the White-plumedAntbird (Pithysalbifrons)in Surinam. Johan Ingels .407COMMENTARY. THEORYAND OBSERVATIONIN MODERNORNITHOLOGY[A FORUM .OrnithologistsasUnconsciousTheorists.JohnR. Krebs.409409WelcomeMathematicians. John T. Emlen.412"WhenI GrowUp. " MartinCody .OrnithologicalTheory:WhenceandWhither?JamesR. King.OnDigestinga Theory.H. .StephenD. . Levin.REVIEWS. Edited by WalterBock.NOTESAND NEWS .414415418420422426252, 282, 338, 384
NUMBER3FEEDING BEHAVIORAND ECOLOGYOF THE GOLIATH HERON.C. MockDouglas W. Mock and Karilyn.DEMOGRAPHY OF EUROPEAN MUTE433SWANS IN CHESAPEAKE BAY.Jan G. Reese.449INLAND MORNING FLIGHT BEHAVIOR OF NOCTURNAL PASSERINE MIGRANTS IN EASTERN NEWYORK.Verner P. Bingroan .465SEX RATIO OF WESTERN GULLS ON SANTA BARBARAISLAND, CALIFORNIA.G.L.Hunt, Jr.,J. C. Wingfield, A. Newman, and D. S. Farner .473REPRODUCTIVEBIOENERGETICSOF WOODDUCKS. Ronald D. Drobney .NESTING CHRONOLOGYOF THE EASTERNBROWNPELICAN. Ralph W. Schreiber.480491USE OF SPACEBY LAPLANDLONGSPURSBREEDINGIN ARCTICALASKA. P.R. Tryon and S. IT.MacLean.509AN ADAPTIVE MODIFICATION IN THE RIBS OF WOODPECKERSAND PICULETS (PICIDAE).Vir-ginia C. Kirby .521TIME AND ENERGY BUDGETSOF THE WILLOW FLYCATCHER(Empidonax traillii) DURING THEBREEDING SEASON. Amelia O. Ettinger and James R. King .533NEWESTIMATES OF WEIGHT LOSS IN BIRDS DURING NOCTURNAL MIGRATION.Hussell and Anne B. Lambert .EXPERIMENTALMANIPULATIONOF BROOD SIZE IN RED-WINGEDBLACKBIRDS.DavidJ. T.547James R. Cron-miller and Charles F. Thompson.559ENERGETICSOF POSTNATALGROWTHIN LEACH'SSTORM-PETREL. Robert E. Ricklefs, SusanC. White, and John Cullen .566EFFECTS OF GRASS LENGTH(Turdus migratorius).PRELIMINARYAND MOWINGON FORAGING BEHAVIOR OF THE AMERICANROBINLeonard A. Eiserer .OBSERVATIONS ON THE OCCURRENCE AND EVOLUTIONOF POLYANDRY576IN THEGALAPAGOSHAWK (Buteogalapagoensis). John Faaborg, Tjitte de Vries, Cindy B. Patterson, and Curtice R. Griffin .581DISTRIBUTION, SPECIESABUNDANCE, AND NESTING-SITE USE OF ATLANTIC COAST COLONIESOF HERONSAND THEIR ALLIES. Thomas W. Custer, Ronald G. Osborn, and William F.Stout.HORMONAL INDUCTIONBraunOF FEATHER PIGMENTATION591IN PTARMIGAN.E.O.HShn and C. E.IN MEMORIAM:ALEXANDER WETMORE.601Paul H. Oehser .608SHORT COMMUNICATIONSThe Diet of the Burrowing Owl in Central Chile and Its Relation to Prey Size.Roberto P. Schlatter,JossL. Ydgez,HermanN igez,and Fabian M. Jaksi .616Breeding Strategiesof Male Yellow-headed Blackbirds: Resultsof a Removal Experiment. Allen T.Rutberg and Sievert Rohwer .619Growth of NestlingRufousHummingbirds. GeorgeD. Constantz .622Further Observationson EcologicalReleasein Mona Island Birds.John Faaborg .624First SpecimenRecordof the Little Stint (Calidrisminuta)for North America. R. 1. G. Morrison.627Diet and Weight of American Kestrelsin Central Chile. Jos L. Ydgez,Herman N igez, Roberto P.Schlatter,and Fabian M. Jaksi .629Nest-site Selectionin the Brown Jay.631Marcy F. Lawton and Robert O. Lawton .Age Differencesin Foraging Black-neckedStilts in Texas.Joanna Burger .633COMMENTARYOn GettingInvolved. Richard C. Banks .637Americanand EuropeanTern Calls.639Barbara W. Massey .Response. LynnJ. Moseley .639REVIEWS. Edited by Walter Bock .640
NUMBER4GENETIC AND PHENOTYPICDIFFERENTIATION IN A WOOD WARBLER (GENUS Dendroica) HYBRID ZONE. GeorgeF. Barrowclough.655FEEDING TERRITORIESOF BROWNSKUAS(Catharacta lonnbergi). Wayne Trivelpiece, RonaldG. Butler, and Nicholas J. Folkman .669FECUNDITYOF THE BROWN-HEADED COWBIRD IN SOUTHERN ONTARIO.D.M.Scott and C.Davison Ankney .CHANGESINNUTRIENTRESERVES AND DIETOF BREEDING677BROWN-HEADEDCOWBIRDS.C. Davison Ankney and D. M. Scott .A COMPARATIVE ANALYSIS OF THE BILL MARKINGS OF WHISTLINGOUT-OF-RANGEOCCURRENCESOF THE TWO TAXA.Sladen684AND BEWICK'S SWANS ANDMary E. Evans and William J. L.697EFFECT OF SEASONON THE ENERGETICS,BODY COMPOSITION,AND CAGE ACTIVITY OF THEFIELD SPARROW. John B. Olson and S. Charles Kendeigh .704GROWTHOF NESTLING IPSWICH SPARROWSIN RELATIONTO SEASON,HABITAT, BROODSIZE,AND PARENTAL AGE.Howard A. Ross .721TERRITORY SIZE DIFFERENCES IN RELATION TO REPRODUCTIVE STAGE AND TYPE OF INTRUDERIN HERRING GULLS(Larus argentatus). Joanna Burger .PATTERNS IN THE AMINO ACID COMPOSITIONS OF AVIANBrush N MACARONIAND ROCKHOPPERPENGUINS.Anthony J. Williams .754FEEDING ECOLOGY OF THE BARN OWL IN CENTRAL CHILE AND SOUTHERN SPAIN: A COMPAP,ATIVE STUDY.Carlos M. Herrera and Fabian M. Jaksii.760POSTNATALDEVELOPMENT OF LEACH'S STORM-PETREL. Robert E. Ricklefs, Susan White,and John Cullen.768DIFFERENTIAL PERCH SITE SELECTIONBY COLORMORPHSOF THE RED-TAILED HAWK (Buteojamaicensis). Charles R. Preston .HUMMINGBIRD FORAGINGBEHAVIORAT Malvaviscus arboreus vat. drummondii. Mary Wissink George.ENERGETICSOF TWO WINTERING RAPTORS. JamesR. Koplin, Michael W. Collopy, Albert R.Barnmann, and Howard Levenson.CROWN COLOR AND DOMINANCEIN THE WHITE-CROWNEDSPARROW.INSULATION IN NESTS OF SELECTED NORTH AMERICANand Michael Kern .790795John Parsons and LuisF. Baptists .THE782807SONGBIRDS.Carol Skowron816DISPLAY RATE AND SPEED OF NEST RELIEF IN ANTARCTIC PYGOSCELIDMiiller-Schwarzeand C. Miiller-Schwarze.PENGUINS.D.825APOSTATIC SELECTION AND KLEPTOPARASITISMIN THE PARASITIC JAEGER: A COMMENT.Bridget L. Furnessand Robert W. Furness .GEOGRAPHICVARIATION IN LEACH'SSTORM-PETREL. David G. Ainley .832837KIN SELECTIONIN RIO GRANDETURKEYS:A CRITICAL ASSESSMENT. David F. Balph, GeorgeS. Innis, and Martha Hatch Balph .854SIMULTANEOUSDOUBLYLABELEDWATER ( HH SO) AND TIME-BUDGETESTIMATESOF DAILYENERGY EXPENDITURE IN Phainopepla nitens. Wesley W. Weathers and Kenneth A.Nagy .861SHORT COMMUNICATIONSCopulatory Behavior of the American Bittern.Paul A. Johnsgard .Group Foragingby Mockingbirdsin a Florida StranglerFig.Arian Time Budgets and Distance to Cover.Peter G. Merritt.868869Thomas Caraco, Steven Martindale, and H. Ronald Pul-lism .872ForcedCopulationin CaptiveMallards.I. Fertilizationof Eggs. JeffreyT. Burns, KimberlyM. Cheng,and Frank McKinney .875SexualDevelopment During Winter in Male American Woodcock.ThomasH. Roberts .FeatherPigmentationand Abrasion:Test of a Hypothesis. GeorgeF. Barrowcloughand Fred C. Sibley 879881
A New Race of Atlapetesleucopterus,with Commentson WidespreadAlbinism in A. l. dresseri(Taczanowski). John W. Fitzpatrick .883Cleaning/FeedingSymbiosisBetweenBirds and Reptilesof the Gal&pagosIslands:New ObservationsofInter-islandVariabiliW. Keith A. Christian .887First Descriptionof the Eggsof the White-wingedGuan, Penelopealbipennis,with Notes on its Nest.Morris D. Williams.889Wind Direction and the SpeciesCompositionof Autumn TV Tower Kills in Northwest Florida.RobertL. Crawford .892Differential Utilization of Prey Resourcesby Great Horned Owls and Barn Owls in Central Chile.Fabian M. Jaksid and Josd L. Yd ez.Food-nicheRelationshipsBetween Chilean Eagles and Red-backedBuzzards in Central Chile.P. Schlatter,JosgL. YdSez,and Fabian M. Jaksi .Stones:an Important IncubationStimulusfor Gulls and Terns.895Roberto897Malcolm C. Coulter .898SocialDifferencesin DefecationBehaviorof Great Blue Herons(Ardeaherodias). RangeD. Bayer .900Rediscoveryof the Rufous-facedCrake (Laterallusxenopterus). Philip Myers and Rick L. Hansen .901First Recordof the Gadwall from the Philippines. RobertS. Kennedyand Edward C. Dickinson .POgVIEWS. Edited by Walter Bock .OBITUARY.NOTESAND NEWS .INDEX TO VOLUME97 .902903922703, 789, 831924SUPPLEMENTSPROCEEDINGS OF THE NINETY-SEVENTH STATED MEETING OF THE AMERICAN ORNITHOLOGISTS UNION .1AA-20AARECENT LITERATURE .1A-32A, 1B-27B, 1C-29C, 1D-23D
THEAUK QuarterlyJournalof OrnithologyPUBLISHED BY THE AMERICAN ORNITHOLOGISTS' UNIONEditor: JOHNA. WIENS,Departmentof Biology,Universityof New Mexico,Albuquerque,NewMexico 87131Assistant to the Editor: JEAN FERNEREditorialBoard:JAMESR. KING,HELMUTC. MUELLER,WILLIAML. THOMPSON,RICHARDL. ZU IAssociate Editors: WALTER BOCK (Reviews), HERBERT W. KALE, II (Periodical Literature)THE AUKwelcomesoriginalreportsdealingwith thebiologyof houttheworld,butmustbe writtenin English.Instructionsto contributorsmaybe foundon theinsidebackcoverof recentissues,or in The Auk, Vol. 94, No. I (January1977).THEAMERICANORNITHOLOGISTS'(FOUNDED 1883)OFFICERSUNIONFOR 1980--81President:JAMESR. ersity,Pullman.Washington 99163.President-Elect:THOMASR. HOWELL,Departmentof Zoology,Universityof nt: GLEN E. WOOLFENDEN,Departmentof Biology,Universityof SouthFlorida, Tampa,Florida33620.Editorof Th
ROBERT W. NERO Photography by Robert R. Taylor In this definitive study of the natural history of the Great Gray Owl (Strix nebulosa), Robert Nero gives first-hand descriptions of hunting, courtship, and nesting behavior previously unrecorded. It is also a highly personalized account of the author's feelings
