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INDEX TO VOLUME 81

A Ar, A., Rahn, H., and Paganelli, C. V., The avian egg: mass and strength, 331-337 Accipiter bicolor, 320 Araqaris, Collared, see Pteroglossus torquatus cooper%, 219-220, 236 Aramides cajanea, 100-101 gent&s, 195 Aramus guarauna, 101 Acridotheres tristis. 205 Ardea cinerea, 170, 333 Acrocephulus scho&obaenus, 261 herodios, 306 scirpaceus, 261 Ardeola ibis, 93 Actitis mucularia, 99 Arenariu interpres, 99, 295 Aethia cristutella, 94 Athene noctuu, 333 pusilla, 94 Atkins, Natasha, see Duffy, David C. Agelaius phoeniceus, 25, 39, 91, 236, 258-264, 304, Artumus leucorhynchus, 204 314,417420,436 Asiopnmmeus, 307-308, 398 tricolor, 236 Attila, Bright-rumped, see Attilu spadiceus Ainley, D. G., see Roudybush, T. E. Attilu spudiceus, 344 Aix sponsa, 432 Auklet, Cassins,’ see Ptychoramphus aleuticus Ajaia ajuja, 306 Crested, see Aethia cristatella Akepa, see Loxops coccinea Least, see Aethia pusilla Albatross, Black-footed, see Diomedea nigripes Parakeet, see Cyclorrhynchus psittucula Galapagos, see Diomedea irrorata Automolus infuscatus, 343, 344 Laysan, see Diomedea immutubilis ochrulaemus, 344 Royal, see Diomedea epomophora rufipileatus, 344 Alectoris graeca, 333 Aythya umericana, 38 Amakihi, see Loxops virens Amuzonu uutumnalis, 301, 321 B Anabercerthia striaticollis, 319 Anas acutu, 312 Balph, D. F., and Balph, M. H., Behavioral flexibility americana, 312 of Pine Siskins in mixed species foraging groups, clypeuta, 427 211-212 crecca, 197, 214, 312 Balph, M. H., see Balph, D. F. discors, 38 Bananaquit, see Coerebu fluveola fulvigula, 432 Baptista, L. F., and Matsui, M., The source of the dive- platyrhynchos, 3541, 312, 333, 336 noise of the Annas’ Hummingbird, 87-89 &e,er& 312 Barlow, J. C., see Russell, S. M. Ani. Smooth-billed. see Crotophuga ani Barklow, W. E., Graded frequency variations of the Anohs stolidus, 430, 431 . ’ tremolo call of the Common Loon, 53-64 Anser albifrons, 432 Batt, B. D. J., and Prince, H. H., Laying dates, clutch anser, 49, 333 size and egg weight of captive Mallards, 35-41 caerulescens, 46, 194, 232-235,432 Batzli, G. O., see-Williams, J. B.- erythropus, 50 Beal. K. G.. and Gillam. L. D.. On the function of _nrev , fubalis. 49. 229 beating by Roadrunners, 85-87 “rossi, 48 Becard, Pink-throated, see Platypsaris minor Antbird, Bicolored, see Gymnopithys leucaspis Berman, S. L., see Raikow, R. J. Black-faced, see Murmoborus myotherinus Berns, V. D., Golden Eagle nest on Kodiak , Gray, see dercoma&a cinerascens Alaska, 218 Anthracothorax prevostii, 98 Bird-of-paradise, Lorias,’ see Loriu loriae Antshrike, Black-capped, see Thumnophilus schista- Black, C. P., see Holmes, R. T. ceus Blackbird, see Turdus merulu Bluish-slate, see Thamnomanes schistogynus Brewers,’ see Euphagus cyanocephalus Dusky-throated, see ThawLnowlanes ardesiacus European, see Turdus merulu Fasciated, see Cymbilaimus lineatus Red-winged, see Age&us phoeniceus Slaty, see Thamnophilus punctatus Rusty, see Euphagus curolinus Spot-winged, see Pygiptila stellaris Tri-colored, see Ageluius tricolor White-shouldered, see Thamnophilus aethiops Yellow-headed, see Xanthocephalus xanthoceph- Ant-Tanager, Red-crowned, see Habia rubica alus Antwren, Dot-winged, see Microrhopias quixensis Bluebird, Eastern, see Siulia sialis Gray, see Myrmotherula menetriesii Bluhm, C. K., and Ward, K. E., Great Horned Owl pre- Iherings.’ see Murmotherula iheringi dation on a Short-eared Owl, 307-308 Long-winged, see Myrmotherula loigipennis Boag, P. T., and Ratcliffe, L. M., First record of a Black- Ornate, see Myrmotherula ornatu poll Warbler for the GalCpagos, 218 Plain-throated, see Murmotherula haurwelli Bobwhite, see Colinus virginiunus Pygmy, see Myrmothkula brachyura Boersma, P. D., and Wheelwright, N. T., Egg neglect White-eved. see Murmotherula leucophthalmn in the Procellariiformes: Reproductive adapta- White-flankkd, see Myrmotherula axillaris tions in the Fork-tailed Storm-petrel, 157-165 Apapane, see Himatione sanguinea Bonusa umbellus, 214, 217 Aphelocoma ultramarine, 6 Booby, Blue-faced, see Sula dactylatru Aptenodytes forsteri, 195 Brown, see Sula leucogaster Apteryx au&r&s, 198 Borecky, S. R., see Raikow, R. J, upus, 133-145 Boubou, Tropical, see Laniurius ferrugineus Aquila chrysaetos, 218 Bowerbird, Great Grey, see Chlumydera nuchalis r-apax, 333 Boyd, R. L., see Braun, C. E.

445 446 THE CONDOR

Branta bernicla, 47 Chlamydera nuchalis, 203 canadensis, 42, 195,297 Chlidonias leucoptera, 333 leucopsis, 42-52 niger, 431 Braun, C. E., Reid, V. H., Ray, T. D., and Boyd, R. L., Cioconia ciconia, 333 Additional records of White-winged Doves in Circus aeruginosus, 192 Colorado, 96 cyaneus, 192 Braun, C. E., see Giesen, K. M. Clark, G. A., Jr., Body weights of birds: A review, 193- Bubo bubo, 333 202 virginianus, 307-308 Coccyzus minor, 98 Bubulcus ibis, 99, 274, 333 Coereba fiaoeola, 98 Bucevhala albeola. 197 Colaptes-auratus, 370-375, 438 Bufflkhead, see Bucephala albeola Colinus virginianus. 39. 196 Bullfinch, see Pyrrhula pyrrhula Collias, E. C., Collias, N. E., Jacobs, C. H., McAlary, Bunting, Indigo, see Passerina cyanea F., and Fujimoto, J. T., Experimental evidence Lazuli, see Passerina amoena for facilitation of pair formation by bright color Little, see Emberiza pusilla in weaverbirds, 91-93 Snow, see Plectrophenax nivalis Collias, N. E., see Collias, E. C. Burger, J., Competition and predation: Herring Gulls Collocallia vanikorensis. 407 versus Laughing Gulls, 269-277 Colopteryx galeatus, 29i Burger, J., and Trout, J. R., Additional data on body leucocephala, 98 size as a difference related to niche, 305-307 lima, 39 Burhinus oedicnemus, 333 palumbus, 141, 194, 290 Buteo magnirostris, 320 Columbina cruziana, 398 nitidus, 411 Condor, Andean, see Vultur gryphus rufinus, 333 California, see Gymnogyps californianus Butler, R. W., and Kirbyson, J. W., Oyster predation by Contopus sordidulus, 436 the Black Oystercatcher in British Columbia, cirens, 99 433435 Cooke, F., see Sulzbach, D. S. Butorides striatus, 99, 100, 306 Coot, American, see Fulica americana Coragyps stratus, 171 C Corapipo altera, 424 Cacicus cela, 205 Cormorant, Brandts,’ see Phalacrocorax penicillatus Cacique, Yellow-rumped, see Cacicus cela Double-crested, see Phalacrocorax au&us Calcarius lapponicus, 214 Guanay, see Phalacrocorax bougainvillii Calidris mauri, 295 Pelagic, see Phalacrocorax pelagicus minutilla, 99 Red-faced, see Phalacrocorax urile ptilocnemis, 214 Corvus brachyrhynchos, 279-250 Calypte anna, 87-89 corone, 236,333 costae, 87 ossifragus, 274 helenae, 197 Cossypha cyanocampter, 189 Campephilus guatemalensis, 302 Coturnir coturnix, 141, 169, 293 melanoleucos, 299 Cowbird, Brown-headed, see Molothrus ater Campylorhynchus brunneicapillus, 350 Cranioleuca curtata, 319 trochilirostris, 344 Creeper, Brown, see Certhiu familiaris Canachites canadensis, 214 Crossbill, Red, see Loxia curuiro,stra Capercaillie, see Tetrao urogallus Crotophaga ani, 98, 196 Cardinal, see Cardinalis cardinalis Crow, Carrion. see Corvus corone Cardinalis cardinalis, 251-257 Common, see Corvus brachyrhynchos Carduelis carduelis, 72, 333 Fish, see Corvus ossifragus- chloris, 333 Cruz, A., and Tohnston, D. W.. Occurrence and feeding flammea, 96-97 ecology of the Common Flicker on Grand Cay- hornemanni, 96-97 man Island, 370-375 pinus, 211 Cuckoo, see Cuculus canorus spinus, 212 Mangrove, see Coccyzus minor Carpodacus cassinii, 211 Cuculus canorus, 39,244 Carr, G. S., Greater Shearwater in Costa Rica, 323 Cyanocitta cristata, 251-257 Casmerodius albus, 99, 306 Cyanocorux sanblasiuna, 411 Catbird, see Dumetella carolinensis Cyclorrhynchus psittacula, 94 Catharacta skua, 394 Cygnus olor, 47, 186, 197 Cathartes aura, 171 Cymbilaimus lineutus, 344 Cathurus fuscescens, 414 Cyphorhinus aradus, 186, 344 guttatus, 414 Cepphus columba, 213,295 D grylle, 295 Deconychuru longicauda, 344 Cercomacra cinerascens, 344 Delichon urbicu, 141 Certhia fumiliuris, 122-132 Dendragapus obscurus, 78-82, 217 Chaffinch, see Fringilla coelebs Dendrexetastes rufigula, 344 Chat, Yellow-breasted, see lcteria cirens Dendroicn caerulescens, 9-20, 99, 100 Chickadee, Black-capped, see Parus atricapillus coronata, 99 Carolina, see Parus carolinensis discolor, 143 Mexican, see Parus sclateri magnolia, 99 Mountain, see Parus gumbeli palmarum, 99 Chicken, Greater Prairie, see Tympanuchus cupido petechia, 98, 99, 218, 436 INDEX TO VOLUME 81 447

striuta, 99, 218, 219 Finch, Cassins,’ see Carpodacus cassinii tigrina, 99 Gray-crowned Rosy, see Leucosticte tephrocotis sirens, 99 Fitzner, R. E., and Hanson, W. C., A congregation of Depner, G., see Ellis, D. H. wintering Bald Eagles, 311-313 Diomedea epomophora, 162 Flicker, Common, see Colaptes auratus immutabilis, 162 Florida caerulea, 99, 306 irrorata, 162 Flycatcher, Dusky, see Empidonax oberholseri nigripes, 390-396 Eulers,’ see Emvidonax euleri Dixon, K. L., and Martin, D. J., Notes on the vocaliza- Grey-hooded, see Pipromorpha rufioentris tions of the Mexican Chickadee, 421-423 Least, see Empidonax minimus Dove, Caribbean, see Leptotila jamaicensis McConnells’ see Pivromorvha macconnelli Galapagos, see Zenaida galapagoensis Ochre-bellied, see Pipromorpha oleaginea Gold-billed Ground, see Columbina cruziana Olive-sided, see Nuttallornis borealis Mourning, see Zenaida macroura Olive-striped, see Mionectes olioaceus Rock, see Columba &via Sepia-capped, see Leptopogon amaurocephalus Turtle, see Streptopelia risoria Slaty-capped, see Leptopogon superciliaris White-tipped, see Leptotila aerreauxi Streaked, see Myiodynastes maculatus White-winged, see Zenaida asiatica Western, see Empidonax difjkilis Dryocopus lineatus, 299-303 Yellow-margined, see Tolmomyias assimilis pileatus, 299, 372 Yellow-olive, see Tolmomyias sulphurescens Duck, Black-headed, see Heteronetta atricapilla Foliage-gleaner, Buff-throated, see Philydor rufus Domestic, see Anas platyrhynchos Buff-throated, see Automolus ochrolaemus Harlenuin, see Histrionicus histrionicus Chestnut-crowned, see Automolus rujipileatus Duffy, D. C., and Atkins, N., A second breeding record Olive-backed, see Automolus infuscatus for the Grey-hooded Gull (Larus cirrocephalus) Rufous-tailed, see Philydor rujicaudatus on the coast of Peru, 219 Forest-falcon, Slatv-backed, see Micrastur mirandollei Dumetella carolinensis, 99, 100, 251-257 Fowl, Domestic, see gallus Frank. L. G.. see Williams. P. L. E Fratercula cbrniculata, 94; 214 Eagle, Bald, see Haliaeetus leucocephalus Fregata magni$cens, 99 Golden, see Aquila chrysaetos tropica, 162 Egret, Cattle, see Ardeola ibis Fringilla coelebs, 10, 181 Cattle, see Bubulcus ibis Fujimoto, J. T., see Collias, E. C. Great, see Casmerodius albus Fulica americana, 312 Snowy, see Egretta thula Fulmar, Antarctic; see Fulmarus glacialoides Egretta garzettu, 333 Northern, see Fulmarus glachlis thula, 306 Fulmarus glacialis. 94. 198. 390-396 Eider, Common, see Somateria mollissima glaciaibides, 198 Elaenia, Caribbean, see Elaenia martinica G Elaenia martinica, 98 Elanoides forficatus, 207 Gadwell, see Anas strepera Eley, J. W, Parker, T. A. III, and Hunter, D. R., Notes Galerida cristata, 333 on Siptornis striaticollis (Furnariidae) in Peru, Gallinula chloropus, 333 319 Gallus gallus, var. domesticus, 141, 154, 293, 311, 333 Ellis, D. H., and Depner, G., A seven-egg clutch for Gannet, see Morus bassanus the Coopers’ Hawk. 219 Gavia adamsii, 53 Emberiza puska, 141 immer, 53-64,432 Empidonax difjicilis, 436 stellata, 432 euleri, 287 Geothlypis trichas, 99, 100 minimus, 9-20 Geococcyx californianus, 75, 85-87 oberholseri, 436 Geranospiza caerulescens, 320 Erythropygia galactotes, 333 Geronticus eremita, 333 Eudocimus albus, 376-389 Giesen, K. M., and Braun, C. E., Nesting behavior of Eudyptula minor, 118 female White-tailed Ptarmigan in Colorado, Euphagus carolinus, 438 215-217 cyanocephalus, 351,436 Giesen, K. M., and Braun, C. E., Renesting of White- Euphonia, Orange-bellied, see Euphonia xanthogas- tailed Ptarmigan in Colorado. 217-218 ter Gillam, L. D., see Beal, K. G. Euphonia xanthogaster, 344 Gilman, A. P., see Roudybush, T. E. Ewert, D. N., Development of song of a Rufous-sided Glareola pratincola, 333 Towhee raised in acoustic isolation, 313-316 Glaucidium brasilianum, 300 Glaucis hirsuta, 290 F Glyphorynchus spirurus, 344 F&o columbarius, 99, 171 Gnatwren, Collared, see Microbates collaris mexicanus, 170 Half-collared, see Microbates cinereicentris naumanni, 333 Long-billed, see Ramphocaenus melanurus peregrinus, 170 Godwit, Bar-tailed, see Limosa lapponicu sparverius, 166 Goldfinch, European, see Carduelis carduelis tinnunculus, 333 Goose, Barnacle, see Brantu leucopsis Falcon, Collared Forest, see Micrastur semitoryuatus Brant, see Brantu bernicla Laughing, see Herpetotheres cachinnans Cackling, see Branta canadensis Peregrine, see Falco peregrinus , see Brunta cunadensis Prairie, see Falco mexicanus Graylag, see Anser anser 448 THE CONDOR

Lesser Snow, see Anser caerulescens Harrier, Marsh, see Circus aeruginosus Lesser White-fronted, see Anser erythropus Harrison, C. S., The association of marine birds and Pink-footed, see Anser fabalis feeding Gray , 93-96 Ross,’ see Anser rossii Hawk, Bicolored, see Accipiter bicolor Goshawk, see Accipiter gent& Coopers,’ see Accipiter cooperii Gottfried, B. M., Anti-predator aggression in birds Crane, see Gerunospiza caerulescens nesting in old field : An experimental Gray, see Buteo nitidus analysis, 251-257 Roadside, see Buteo magnirostris Grabowski, G. L., Vocalizations of the Rufous-backed Savannah, see Heterospizias meridionalis Thrush (Turdus rufopulliatus) in Guerrero, Heineman, D., see Wahl, T. R. Mexico, 409416 Helmitheros vermivorus, 99 Grackle, Common, see Quiscalus Quiscula Hemiprocne corn&a, 308 Great-tailed, see Q&caZus m&icanus longipennis, 308 Grant, G. S., Ring-billed Gull feeding on date fruit. Hen-harrier, see Circus cyaneus 432-433 .. Henicorhinu leucosticta, 424 Grant, K. T., see Grant, P. R. Heron, Black-crowned Night, see Nycticorax nycticor- Grant, P. R., and Grant, K. T., Breeding and feeding ax ecology of the Galapagos Dove, 397403 Great Blue, see Ardeu herodias Grassquit, Black-faced, see Tiaris bicolor Green, see Butorides striatus Grau, C. R., see Roudybush, T. E. Grey, see Ardea cinerea Graves, G. R., see Eley, J. W. Little Blue, see Florida caeruleu Grebe. Pied-billed. see Podilumbus vodicens Louisiana, see Hydranassa tricolor Silvery, see Pddiceps occipitalis ’ ’ Northern Green, see Butorides striatus Greenlet, Tawny-crowned, see Hylophilus ochracei- Yellow-crowned Night, see Nyctanassa violaceu ceps Herpetotheres cachinnans, 322 Grosbeak, Evening, see Hesperiphona vespertina Hesperiphona cespertina, 211 Grouse, Black, see Lyrurus tetrix Heteronetta atricapilla, 195 Blue, see Dendragapus ob.pcurus Heterospizias meridionalis, 320 Red, see Lagopus lagopus Hicks, R. E., Guano deposition in an Oklahoma crow Ruffed, see Bonasa umbellus roost, 247-250 Sharu-tailed. see Pedioecetes nhasianellus Hilsenbeck, S. G., Food of Silvery Grebes (Podiceps Spruce, see Canachites canaaensis oc&italis) at Lake Cuicocha. Ecuador, 316 Grzybowski, J. A., Responses of Barn Swallows to eggs, Himantopus himantopus, 333 young, nests, and nest sites, 236-246 Himatione sanguinea, 68 Guanay, see Phalacrocorar bougainvillii Hirsch, K. V., see Roudybush, T. E. Guillemot, Black, see Cepphus grylle Hirundo rustica, 99, 236 Pigeon, see Cepphus columba Histrionicus histrionicus, 214 Gull, Black-headed, see Larus ridibundus Holmes, R. T., Black, C. P., and Sherry, T. W., Com- Black-tailed, see Larus crussirostris parative population bioenergetics of three insec- Bonapartes,’ see Lurus philadelphiu tivorous passerines in a deciduous forest, Q-20 Brown-hooded, see Larus maculipennis Honey-guide, Greater, see Indicator indicator California, see Lorus californicus Hummingbird, Allens,’ see Selasphorus sasin Glaucous, see Larus hyperboreus Annas,’ see Calypte anna Glaucous-winged, see Larus glaucescens Costas,’ see Calypte costue Great Black-backed, see Larus marinus Cuban Bee, see Calypte helenue Grey-hooded, see Larus cirrocephalus Hairy Hermit, see Glaucis hirsuta Herring, see Larus argentatus Hunter, D. R., see Eley, J. W. Laughing, see Larus atricilla Hydranassa tricolor, 306 Lesser Black-backed, see Larus fuscus Hydrobutes pelagicus, 143, 162 Mew, see Larus canus Hylocichla mustelina, 414 Ring-billed. see Larus delawarensis Hyloctistes subulatus, 344 Sabines,’ see Xema sabini Hylexetustes stresemanni, 344 Silver, see Larus novaehollandiae Hylophilus ochraceiceps, 343, 344 Western, see Larus occidentalis Gygis alba, 431 I Gymnogyps californianus, 166-172 Gymnopithys leucaspis, 424 Ibis, Glossy, see Plegadis falcinellus Gymnorhinus cyanocephalus, 63 White,.see Eud&imus albus Gyps fulvus, 333 White-faced. see Pleeadis chihi lcteria virens, 4!36 y H lcterus bullockii, 93 Habia rubicu, 343, 344 cucullatus, 28, 93 Haematopus bachmani, 433 galbula, 28-34, 436 ostralegus, 433 leucopteryx, 98 palliatus, 433 Iiwi, see Vestiatia coccinea Haliaeetus leucocephalus, 218, 311-313 Indicator indicator, 93 Hall-Craggs, J., Sound spectrographic analysis: sug- lridoprocne bicolor, 244, 438 gestions for facilitating auditory imagery, 185- 192 Hanka, L. R., Choice of host nest by the Brown-headed J Cowbird in Colorado and Wvomine. 436437 Jacobs, C. H., see Collias, E. C. Hannon, S. J., and Zwickel, F. C., Piobabik non-breed- Jaeger, Long-tailed, see Stercorurius longicaudus ers among female Blue Grouse, 78-82 Parasitic, see Stercorarius parasiticus Hanson, W. C., see Fitzner, R. E. Pomarine, see Stercorarius pomarinus INDEX TO VOLUME 81 449 . Jay, Blue, see Cyanocittu cristatu Lemke, T. O., Fruit-eating behavior of Swallow-tailed Brown, see Psilorhinus morio Kites (Elanoides forficutus) in Colombia, Mexican, see Aphelocoma ultromarinu 207-208 Piiion, see Gymnorhinus cyanocephalus Leptasthenura fulijiniceps, 208 San Bias, see Cyunocorax sanblasiana Leptopogon amaurocephalu.s, 344 Jenkins, J. M., Natural history of the Guam Rail, 404- superciliaris, 287 408 Leptotila jamuicensis, 98 Johnston, D. W., see Cruz, A. aerreauxi, 90 Johnston, D. W., The uropygial gland of the Sooty Leucopsar rothschildi, 205 Tern, 430432 Leucosticte tephrocotis, 213 Junco caniceps, 436 Levenson, H., Time and activity budget of Ospreys hyemalis, 122, 180, 181, 314 nesting in northern California, 364-369 phaeonotus, 180, 181, 314 Lill, A., Nest inattentiveness and its influence on de- Junco, Dark-eyed, see Junco hyemnlis velopment of the young in the Superb Lyrebird, Gray-headed, see Junco cuniceps 225-23 1 Yellow-eyed, see Junco phaeonotus Limosu lapponicu, 294-298 Limpkin, see Arumus guaruuna K Lobipes lobatus, 295 Kessel, B., Starlings become established at Fairbanks, Lonchura &cans, 90 Alaska, 437438 Longspur, Lapland, see Calcurius lapponicus Kestrel, American, see Falco spartierius Loon, Common, see Gaz;ia immer Kiff, L. F., Peakall, D. B., and Wilbur, S. R., Recent Yellow-billed, see Gavia adamsii changes in California Condor eggshells, 166- Lophortyx californicus, 282 172 Loria loriae, 203 Kilham, L., Snake and pond snails as food of Grey- Loxia curtiirostra, 212 necked Wood-rails, 100-101 Loxops coccineu, 68 Kilham, L., and OBrien,’ P., Early breeding behavior oirens, 68 of Lineated Woodpeckers, 299-303 Lunda cirrhata, 214, 295 Kingbird, Tropical, see Tyrannus melancholicus Lundberg, C.-A., and Vaisanen, R. A., Selective cor- Western, see Tyrannus zjerticalis relation of egg size with chick mortality in the Kirbyson, J. W., see Butler, R. W. Black-headed Gull (Larus ridibundus), 146-156 Kite, Everglade, see Rostrhamus sociubilis Lyrebird, Superb, see Menurn superba Swallow-tailed, see Elanoides forficatus Lyrurus tetrir, 261 Kittiwake, Black-legged, see Rissa tridactyla M Kiwi, Brown, see Apteryx australis Knonf. F. L.. SDatial and temnoral asDects of colonial Mader, W. J., First nest description for the genus Mi- _ nesting‘ df White Pelicans, 353-363 crustur (Forest Falcons), 320 Koenig, W. D., and Williams, P. L., Notes on the status Malcoha, Raffles,’ see Phoenicophaeus chlorophneus of Acorn Woodpeckers in Central Mexico. 317- Mallard, see Anus platyrhynchos 318 Munucus manacus, 289 Kushlan, J. A., Feeding ecology and prey selection in vitellinus, 90 the White Ibis, 376-389 Manakin, Golden-collared, see Manacus tiitellinus Red-capped, see Pipra mentalis L White-bearded, see Manacus manacus Lagopus lagopus, 216,261 White-ruffed, see Corupipo alteru leucurus, 214, 217-218 Mango, Green-breasted, see Anthracothorax precostii m&us, 216 Manuwal, D. A., Reproductive committment and suc- Lamm, D. W., see Russell, S. M. cess of Cassins’ Auklet, Ill-121 Land-rail, Banded, see Rallus philippensis Martin, D. J., Songs of the Fox Sparrow. II Intra- and Laniurius ferrugineus, 189 Interpopulation variation, 173-184 Lanio versicolor, 343, 344 Martin, D. J., see Dixon, K. L. Lanius nubicus, 333 Martin, House, see Delichon urbica Larosternu inca, 431 Matsui, M., see Baptista, L. F. Laru.s argentutus, 39, 141, 146-156, 158, 171,230,236, McAlary, F., see Collias, E. C. 249, 269-271,295,394,427 McClure, H. E., Nesting of the White-whiskered Tree atricilla, 99, 142, 269-277 Swift in Malaya, 308-311 californicus, 269-277, 390-396 McEllin, S. M., Nest sites and population demograph- canus, 94, 275,295 ics of White-breasted and Pigmy nuthatches in cirrocephalus, 219, 438-439 Colorado, 348-352 crassirostris, 275 Meadowlark, Western, see Sturnella neglecta delawurensis, 141, 163, 269-277, 295, 432-433 Megaceryle nlcyon, 99 fuscus, 269-277 Megadyptes antipodes, 36 glaucescens, 213, 275, 295, 390-396 Melanerpes carolinus, 122-132 hyperboreus, 94, 295 erythrocephalus, 6, 122-132 maculipennis, 274 formiciz;orus, l-7, 317-318 marinus, 295 lewis, 6 novaehollandiue, 118 superciliaris, 373, 374 occident&s, 116, 295, 390-396 Melunitta fusca, 36 Philadelphia, 94 Melengris ~allopavo, 293 ridibundus, 146-156, 269-277, 333 Melonsittacus undulatus. 333 Leafscraper, Black-tailed, see Sclerurus caudacutus Melospizcl lincolnii, 436 ’ Leiothrix lutea, 68 melodia, 39, 143, 173, 181, 214, 279, 314 Leiothrix, Red-billed, see Leiothrix lutea Menuru superba, 225-231 450 THE CONDOR

Mergus serrator, 432 Osprey, see Pandion haliaetus Merlin, see Falco columbarius Ostrich, see Struthio camelus Micrastur mirandollei, 345 Ovenbird, see Seiurus aurocapillus semitorquatus, 320 Owen, M., and Ogilvie, M. A., Wing molt and weights Microbates cinereiventris, 101 of Barnacle Geese in Spitsbergen, 42-52 collaris, 101-102 Owl, Great Horned, see Bubo virginianus Microrhopias quixensis, 340, 343-344 Short-eared, see Asio jlammeus Mimus giluus, 98 Snowy, see Nyctea scandiaca Mionectes olioaceus, 344 Oystercatcher, American, see Haematopus palliatus Mniotilta varia, 99 Black, see Haematopus bachmani Mockingbird, Galipagos, see Nesomimus parmdus European, see Haematopus ostralegus Tropical, see Mimus gilvus P Molothrus ater, 21, 244, 249, 304, 427, 436-437 Morrison, M. L., Eggshell thickness changes in Pacific Pachyptila desolata, 162 Ocean Phaethontidae and Sulidae, 209 Paganelli, C. V., see Ar, A. Morton, M. L., Fecal sac ingestion in the Mountain Pagodroma nivea, 162 White-crowned Sparrow, 72-77 Pandion haliaetus. 364-369 Morus bassanus, 39,43i Parker, T. A., III, see Eley, J. W. Munia, Dusky, see Lonchura &cans Parrot, Red-lored, see Amazona autumnalis Munn, C. A., Terborgh, J. W., Multi-species territori- White-crowned, see Pionis senilis ality in neotropical foraging flocks, 338-347 Partridge, see Perdix perdix Murre, Common, see Uris aalge Parula americana, 99, 100 Thick-billed, see Uria lomvia Parula, Northern, see Parula americana Murrelet, Ancient, see Synthliboramphus antiquus Parus atricapillus, 421 Muscicapa striata, 333 caeruleus, 155 Mycteria americana, 378 carolinensis. 261. 421. 420 Myiodynastes maculatus, 301 gambeli, 42i Myna, Common, see Acridotheres tristis hudsonicus, 423 Rothschilds,’ see Leucopsar rothschildi inornatus. 421 Myrmoborus myotherinus, 344 major, 36; 133, 143, 153 Myrmotherula axillaris, 304-341, 342, 344 sclateri, 421423 brachyura, 340,343,344 Passer domesticus, 86. 93. 141. 195,236. 251,267, 333. hauxwelli, 340, 343 427, 431, 436 iheringi, 340, 341, 342, 344 moabiticus, 333 leucophthalma, 340,343,344 montanus, 104 longipennis, 340, 342, 344 Passerculus sandwichensis, 196 menetriesii, 341, 342, 344 Passerella iliaca, 173-184, 204, 278 ornata, 344 Passerina amoena, 182, 436 N cyanea, 99, 143 Patten, S. M., see Roudybush, T. E. Nectarinia osea, 333, 336 Paulson, D. R., see Perrone, Jr., M. Neill, R. L., see Sharp, M. S. Peakall, D. B., see Kiff, L. F. Nesomimus parvulus, 398 Pearson, 0. P., Spacing and orientation among feeding Norman, D. O., see Smith, D. G. Golden-crowned Sparrows, 278-285 Numenius phaeopus, 99 Pedioecetes phasianellusi 261 Nutallornis borealis, 436 Pelagodroma marina, 162 Nuthatch, Pigmy, see Sitta pygmaea Pelecanus conspicillatus, 359 White-breasted, see Sitta carolinensis erythrorhykhos, 353-363 Nyctanassa violacea, 306, 398 occidentalis. 170. 209. 361 N&tea scandiaca, 213-214, 230 onocrotalus; 359 ’ Nuctibius nrandis. 320-321. 322 rufescens, 359 griseui, 322 Pelican, Australian, see Pelecanus conspicillatus Nycticorax nycticorax, 244, 306, 333 Brown, see Pelecanus occidentalis European White, see Pelecanus onocrotalus 0 Pink-backed. see Pelecanus rufescens OBrien,’ P., see Kilham, L. White, see Pelecanus erythroriynchos Oceanodroma Castro, 157 Penguin, Ad&lie, see Pygoscelis adeliae furcata, 157-165,214,390-396 Emperor, see Aptenodytes forsteri homochroa, 164 Little, see Eudyptula minor leucorhoa, 102-103, 157, 214 Yellow-eyed, see Megadyptes antipodes tethys, 162 Perdix perdix, 429 Oceanites oceanicus, 162,230 Perrone, Jr., M., and Paulson, D. R., Incidence of dis- OConnor,’ R. J., Egg weights and brood reduction in tress calls in mist-netted birds, 423424 the European Swift (Apus apus), 133-145 Perry, D. R., The Great Potoo in Costa Rica, 320-321 Ogilvie, M. A., see Owen, M. Peterson, M. R., see Roudybush, T. E. Omao, see Phaeornis obscurus Petrel, Gray-faced, see Pterodroma macroptera Oniki, Y., and Willis, E. P., A nest of the Collared Mottled, see Pterodroma inexpectata Gnatwren (Microbates collaris), 101-102 Snow, see Pagodroma nivea Oporornis formosus, 99 Storm, see Hydrobates pelagicus Oriole, Bullocks,’ see Zcterus bullockii Petrochelidon pyrrhonota, 438 Hooded, see Zcterus cucullatus Peewee, Western Wood, see Contopus sordid&s Jamaican, see Zcterus leucopteryx Phaeornis obscurus, 65-71 Northern, see Zcterus galbula Phaethon rubricauda, 209 INDEX TO VOLUME 81 451

Phalacrocorax aristotelis, 39, 143 Pygmy-owl, Ferruginous, see Glaucidium hrasilianum auritus, 209 Pygmy-tyrant, Helmeted, see Colopteryx galeatus bougainvillii, 118, 248 Pygoscelis adeliae, 36, 431 pelagicus, 213 Pyrrhula pyrrhula, 195 penicillatus, 116 wile, 213 Q Phalarope, Northern, see Lobipes lobatus Quail, California, see Lophortyx californicus Red, see Phalaropus fulicarius Common, see Coturnix coturnix Phalaropus fulicarius, 295 Japanese, see Coturnix coturnix Phasianus colchicus, 333 Quiscalus mexicanus, 304, 411, 427 Pheucticus ludovicianus, 99 quiscula, 143, 248, 304,427, 436 Philydor ruficaudatus, 342, 344 rufus, 344 R Phoebe, Says,’ see Sayornis saya Rahn, H., see Ar, A. Phoenicophaeus chlorophaeus, 309 Raikow, R. J., Borecky, S. R., and Berman, S. L., The Picoides borealis, 372 evolutionary re-establishment of a lost ancestral pubescens, 122-132,302, 372 muscle in the bowerbird assemblage. 203-206 villosus, 372 Rail, Barred, see Rallus torquatus Piculet, Rufous-breasted, see Picumnus rufiventris Guam, see Rallus owstoni Picumnus rufiventris, 344 Laysan, see Porzanula palmeri Pigeon, White-crowned, see Columba leucocephala Rallus owstoni, 404-408 Wood, see Columba palumbus philippensis, 404 Pinkowski, B. C., Effect of nesting history on egg size torquatus, 404 in Eastern Bluebirds, 210 Ramphocaenus melanurus, 101 Pinkowski, B. C., Nest site selection in Eastern Blue- Ratcliffe, L. M., see Boag, P. T. birds, 435436 Ray, T. D., see Braun, 0. E. Pintail, see Anus acuta Redhead, see Aythya americana Pionis se&is, 301 Redpoll, Common, see Card&is jlammea Pipilo erythrophthalmus, 313-316 Hoary, see Carduelis hornemanni fuscus, 282 Lesser, see Carduelis flammea Pipra mentalis, 90 Redstart, American, see Setophaga ruticilla Pipromorpha macconnelli, 286 Reid. V. H.. see Braun, 0. E. oleaginea, 286-292, 344 Ridgely, R. S., and Wilcove, D., First nesting record of rujiventris, 286 Gray-hooded Gull from Ecuador, 438-439 Piranga ludoviciana, 93 Riparia riparia, 99, 236 Platypsaris minor, 344 Rissa tridactyla, 39, 94, 116, 152, 213, 295, 394 Pleasants. B. Y.. Adantive significance of the variable Roadrunner, see Geococcyx californianus dispersion patterns of breeding Northern Ori- Roberts. R. C.. and resource relationshins in oles, 28-34 Acorn Woodpeckers, l-8 Plectrophenax nivalis, 214 Robin, American, see Turdus migratorius Plegadis chihi, 306 Pale-vented. see Turdus fumigatus falcinellus, 306 Robin-chat, Blue-shouldered, see Cossypha cyano- Ploceus cucullatus, 91-93 campter Podiceps occipitalis, 316 Rostrhamus sociabilis, 101 Podilymbus podiceps, 431, 432 Roudybush, T. E., Grau, C. R., Peterson, M. R., Ainley, Porzanula palmeri, 405 D. G., Hirsch, K. V., Gilman, A. P., and Patten, Potoo, Common, see Nyctibius griseus S. M., Yolk formation in some charadriiform Great, see Nyctibius grandis birds, 293-298 Prickletail, Spectacled, see Siptornis striaticollis Russell, S. M., Barlow, J. C., and Lamm, D. W., Status Prince, H. H., see Batts, B. D. J. of some birds on Isla San Andres and Isla Provi- Prinia gracilis, 333 dencia, Colombia, 98-100 Prion, Dove, see Pachyptila desolata Rutledge, J. T., see Schwab, R. G. Prion, Fairy, see Pachyptila turtur s Procellaria tenuirostris, 36 Protonotaria citrea, 99 Sandpiper, Rock see Calidris ptilocnemis Psilorhinus morio, 301 Western, see Calidris mauri Ptarmigan, Rock, see Lagopus mutus Sayornis saya, 436 White-tailed, see Lagopus leucurus Schwab, R. G., and Rutledge, J. T., Photophase and Pterodroma inexpectata, 162 testicular recrudescence in European Starlings, macroptera, 162 265-268 Pteroglossus torquatus, 301 Sclerurus caudacutus, 344 Ptych&hus uleuticus, ill-121,214,295 Scoters, Velvet, see Melanitta fusca Puffin. Horned. see Fratercula corniculata Scott, J. M., see van Riper 111,-C. Tufted, see Lunda cirrhata Scutalopus magellanicus, 208 Puffinus bulleri, 390-396 supercilia&, 208 carneipes, 390-396 Scythebill, Red-billed, see Campylorhamphus trochi- creatopus, 390-396 lirostris gravis, 323 Searcy, W. A., Size and mortality in male Yellow-head- griseus, 94, 162, 323,390-396 ed Blackbirds, 304-305 puffinus, 36, 162 Searcy, W. A., Morphological correlates of dominance tenuirostris, 94 in captive male Red-winged blackbirds, 417-420 Pycnonotus capensis, 333 Seiurus aurocapillus, 31, 99, 182 Pygiptila stelleris, 344 noveboracensis, 99 452 THE CONDOR

Selasphorus sasin, 88 Fork-tailed, see Oceanodroma furcata Setophaga ruticilla, 99, 100 Galhpagos, see Oceanodroma tethys Shag, see Phalacrocorax aristotelis Leachs,’ see Oceanodroma leucorhoa Sharu. M. S.. and Neill. R. L.. Phvsical deformities in Madeiran, see Oceanodroma Castro L a‘ popilation of wintering blackbirds, 427-320 White-faced, see Pelagodroma marina Shearwater, Bullers,’ see Puffinus bulleri Wilsons,’ see Oceanites oeanicus Flesh-footed, see Puffinus carneipes Streptopelia decaocto, 333 Manx, see Puffinus puffinus risoria, 162, 333, 335 Pink-footed, see Puffinus creatopus senegalensis, 333 Short-tailed, see Procellaria tenuirostris turtur, 333 Sooty, see Puffinus griseus Strix aluco, 333 Sherry, T. T., see-Holmes, R. T. Struthio camelus. 194. 333 Shields. G. F.. see Trov. D. M. Sturnella neglecta, 314 Short, J: J., Patterns of-alpha-diversity and abundance Sturnus vulgaris, 74, 244, 265-268,429,437-438 in breeding bird communities across North Sula dactylatra, 209, 360 America, 21-27 leucogaster, 209, 360 Shoveler, Northern, see Anas clypeata sula, 209 Shrike-tanager, White-winged, see Lanio uersicolor Sulzbach, D. S., and Cooke, F., Demographic param- Sialia sialis, 210, 435436 eters of a nesting colony of Snow Geese, 232- Siptornis striaticollis, 319 235 Siskin, Eurasian, see Carduelis spinus Sunbird, Palestine, see Nectarinia osea Pine, see Carduelis pinus Swallow, Bank, see Riparia riparia Sitta carolinensis, 122-132, 348-352 Barn, see Hirundo rustica pygmaea, 348-352 Cliff, see Petrochelidon pyrrhonota Sittasomus griseicavillus, 341, 343, 344 Mangrove, see Tachycineta albilinea Skua, see Catharacta skua Rough-winged, see Stelgidopteryx rujicollis Slud. P.. First record of Leachs’ Storm-Detrel in Costa Tree, see lridoprocne bicolor Rica: a correction, 102-103 _ Violet-green, see Tachycineta thalassina Slud, P., Calls of the Great Potoo, 322 Swan, Mute, see Cygnus olor Snow, B. K., and Snow, D. W., The Ochre-bellied Fly- Swift, European, see Apus apus catcher and the evolution of lek behavior, 286- Swiftlet, Vanikoro, see Collocallia uanikorensis 292 Syloia borin, 193 Snow, D. W., see Snow, B. K. Synthliboramphus antiquus, 214 Smith, D. G., and Norman, D. O., “Leader-follower” singing in Red-winged Blackbirds, 83-85 Somateria mollissima, 36, 427 Tachycineta albilinea, 90 Sparrow, Brewers,’ see Spizella breweri thalassina, 438 Eurasion Tree, see Passer montanus Tachyphonus rujioenter, 344 Field, see Spizella pusilla Tanager, Green-and-Gold, see Tangara schrankii Fox, see Passerella iliaca Palm, see Threupis palmarum Golden-crowned, see Zonotrichia atricapilla Silver-throated, see Tangara icterocephala Harris, see Zonotrichia querula Western, see Pirangu ludoviciana House, see Passer domesticus Yellow-crested, see Tachyphonus rufioenter lpswich, see Passerculus sandwichensis Tangara icterocephala, 424 Lincolns.’ see Melosviza lincolnii schrankii, 344 Rufous-cdllared, see Zonotrichia‘ capensis Tapaculo, Andean, see Scytalopus magellanicus Song, see Melospiza melodia White-browed, see Scytalopus superciliaris White-crowned, see Zonotrichia leucophrys Teal, Blue-winged, see Anas discors White-throated, see Zonotrichia albicollis Green-winged, see Anas crecca Teratornis merriami, 197 Spizella breweri, 436 Terborgh, J. W., see Munn, C. A. pusilla, 251-257, 261, 304 Terenura callinota, 319 Spoonbill, Roseate, see Ajaia ajaja Tern, , see Sterna paradisuea Starling European, see Sturnus vulgaris Bridled, see Sterna anuethetus Stelgidopteryx ruficollis, 244 Common, see Sterna hirundo Stercorarius longicaudus, 394 Noddy, see Anous stolidus parasiticus, 213, 390 Royal, see Sternu maximus pomarinus, 390 Sandwich, see Sternu sandvicensis Sterna albifrons, 430 Sooty, see Sterna fuse&a anaethetus, 431 Tetrao urogallus, 229 caspia, 430,431 Thumnomunes ardesiacus, 339,342, 344 forsteri, 431 schistogynus, 339, 342, 344 fuscata, 236,430-432 Thamnophilus aethiops, 344 hirundo, 146, 162, 170,269, 333, 431 punctatus, 90 maxima, 99,236,431 schistaceus, 344 paradisaea, 94, 152,. 274, 295, 431 Thompson, W. L., Suggestions for preparing audio- sandvicensis, 361, 431 spectrograms for publication, 220-221 Stiles, E. W., Nest and eggs of the White-browed Thrasher, Brown, see Toxostomu rufum Tanaculo (Scutalovus superciliaris), 208 California, see Toxostoma redioivum Stork, Wood, see Micteiia americana Thruupis palmarum, 205 Storm-petrel, see Hydrobates pelagicus Thrush, Black-billed, see Turdus ignobilis Ashy, see Oceanodroma homochroa Clay-colored, see Turdus grayi Black-bellied, see Fregetta tropica European song, see Turdus philomelos INDEX TO VOLUME 81 453

Great, see Turdus fuscuter Vireo altiloquus, 98 Hermit, see Catharus guttatus curibueus, 98 Mistle, see Turdus viscivorus crussirostris, 98 New Zealand, see Turnugru cupensis gilvus, 436 Rufous-backed, see Turdus rufopulliutus olivaceus, 9-20 Song, see Turdus philomelos solitarius, 436 White-necked, see Turdus ussimilis Vleck, C. M., and Vleck, D., Metabolic rate in five trop- Wood, see Hylocichlu mustelinu ical species, 89-91 Thryothorus ludovicianus, 261 Vleck, D., see Vleck, C. M. Tiaris bicolor, 100 Vultur gryphus, 170 Tit, Blue, see Purus cueruleus Vulture, Black, see Corugyps utratus Great, see Parus major Turkey, see Cathartes aura Titmouse, Plain, see Purus inornutus W Tit-spinetail, Brown-capped, see Leptasthenura fuli- giniceps Wahl, T. R., and Heinemann, D., and fishing Titvra., / Black-tailed. see Titura cauana vessels: Co-occurrence and attraction, 390-396 Masked, see Tityru sekifasciata Warbler, Blackpoll, see Dendroicu striutu Tityra cayana, 301 Black-throated Blue, see Dendroica cuerulescens semifasciatu, 301 Garden, see Sylvia borin Tolmomyius ussimilis, 344 Hooded, see Wilsoniu citrinu sulphurescens, 290 Prairie, see Dendroica discolor Towhee, Brown, see Pipilo fuscus Reed, see Acrocephalus scirpuceus Rufous-sided, see Pipilo erythrophthalmus Sedge, see Acrocephulus schoenobaenus Toxostomu redivioum, 282 Tennessee, see Vermivora peregrina rufum, 251-257 Worm-eating, see Helmitheros vermivorus Tree Swift, Grey-rumped, see Hemiprocne longipen- Yellow, see Dendroica petechiu nis Ward, E. K., see Bluhm, C. K. Lesser, see Hemiprocne corn&u Wasserman, F. E., The relationship between habitat Troglodytes uedon, 39, 143, 210 and song in the White-throated Sparrow, 424, troglodytes, 213 426 Tropicbird, Red-tailed, see Phaethon rubricauda Waterthrush, Northern, see Seiurus noveboracensis Trout, J. R., see Burger, J. Weatherhead, P. J., Behavioral implications of the de- Troy, D. M., and Shields, G. F., Multiple nesting at- fense of a Shoveler brood by Common Eiders, tempts by Alaskan Redpolls, 96-98 427 Turdus ussimilis, 414 Weaverbird, Village, see Ploceus cucullutus fumigatus, 409 Wheelwright, N. T., see Boersma, P. D. fuscuter, 414 White-eye, Japanese, see Zosterops juponica gruyi, 414 Wigeon, American, see Anus americana ignobilis, 414 Wilbur, S. R., see Kiff, L. F. merulu, 53, 189, 333, 409 Wilcove, D., see Ridgely, R. S. migrutorius, 251-257, 409, 429, 436 Williams, J. B., and Batzli, G. O., Competition among philomelos, 67, 143 bark-foraging birds in Central Illinois: experi- plebejus, 414 mental evidence, 122-132 rufopalliatus, 409-416 Williams, P. L., and Frank, L. G., Diet of the Snowy viscivorus, 409 Owl in the absence of small mammals, 213-214 Turkey, see Meleagris gallopuvo Williams, P. L., see Koenig, W. D. Turnugra capensis, 203 Willis, E. O., see Oniki, Y. Turnstone, Ruddy, see Arenuriu interpres Wilsoniu citrinu, 99 Tympunuchus cupido, 261 Woodcreeper, Bar-bellied, see Hy1exetuste.s strese- Tyrannus melancholicus, 196 munni tyrunnus, 99 Buff-throated, see Xiphorhynchus guttatus verticalis, 31 Cinnamon-throated. see Dendrexetastes rufinula Tyto albu, 333 Long-tailed, see Deconychuru longicuuda _ _ Olivaceous, see Sittasomus griseicapillus U Spixs,’ see Xiphorhynchus spixii Uriu aulge, 213, 236, 295 Striped, see Xiphorhynchus obsoletus lomviu, 213 Wedge-billed, see Glyphorynchus spirurus Uroctonus cuzieri, 341 Woodhaunter, Striped, see Hyloctistes subulutus Woodpecker, Acorn, see Melanerpes formicivorus V Crimson Crested, see Cumpephilus melunoleucos Vaisanen, R. A., see Lundberg, C.-A. Downy, see Picoides pubescens van Riper III, C., and Scott, J. M., Observations on Hairy, see Picoides villosus distribution, diet and breeding of the Hawaiian Lewis,’ see Melunerpes lewis Thrush, 65-71 Lineated, see Dryocopus lineutus Veery, see Catharus fuscescens Pale-billed, see Cumpephilus guutemalensis Vermivoru peregrinu, 99, 100 Pileated, see Drycopus pileatus Vestiuria coccinea, 68 Red-bellied, see Melanerpes superciliuris Vireo, Black-whiskered, see Vireo altiloquus Red-bellied, see Melanerpes curolinus Red-eyed, see Vireo olivaceus Red-cockaded, see Picoides borealis San Andres, see Vireo caribaeus Red-headed, see Melunerpes erythrocephulus Solitary, see Vireo solitarius Wood-rail, Grey-necked, see Aramides cajaneu Thick-billed, see Vireo crassirostris Woodswallow, White-breasted, see Artamus leuco- Warbling, see Vireo gilvus rhynchus 454 THE CONDOR

Uood-wren,’ White-breasted. see Henicorhinu leuco- Y stictu Yasukawa, K., Territory establishment in Red-winged Wren, Cactus, see Campylorhynchus hrunneicupillus Blackbirds: Importance of aggressive behavior Carolina, see Thrl4othorws ludooicianus and experience, 258-264 House, s&e Troglodytes uedon Yellowthroat, Common, see Geothlypis trichus Musician, see Cyphorhinus uradus Winter, see Troglodytes troglodytes Z

X Zenaida asiuticn, 98 galapugoensis, 397403 Xanthocephalus xanthocephalus, 25, 304-305, 427- mucrouru. 96. 251-257. 282. 436 430,437 Zonotrichiu aibicbllis, 63, iSO, i94, 417, 424426 Xema suhini, 295, 390-396 atricapilla, 122, 278-285 Xenops minutus, 343, 344 cupensis, 180, 261, 426 rutilans, 319 leucophrys, 72-77, 180, 181 Xenops, Plain, see Xenops minutus querulu, 284, 417 Xiphorhynchus guttutus, 90, 344 Zosterops juponicu, 68 ohsoletus, 341, 343, 344 Zwickel, F. C., see Hannon, S. J. spixii, 344