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Articles 511 - 540 of 834
Full-Text Articles in Animal Sciences
Birds Of The Great Plains: Family Gruidae (Cranes), Paul A. Johnsgard
Birds Of The Great Plains: Family Gruidae (Cranes), Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
Whooping Crane
Greater Sandhill Crane
Birds Of The Great Plains: Family Picidae (Woodpeckers), Paul A. Johnsgard
Birds Of The Great Plains: Family Picidae (Woodpeckers), Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
Common Flicker (Yellow-shafted and Red-shafted Flickers)
Pileated Woodpecker
Red-bellied Woodpecker
Golden -fronted Woodpecker
Red-headed Woodpecker
Lewis Woodpecker
Yellow-bellied Sapsucker
Hairy Woodpecker
Downy Woodpecker
Ladder-backed Woodpecker
Red-cockaded Woodpecker
Black-backed Three-toed Woodpecker
Northern Three-toed Woodpecker
Birds Of The Great Plains: Family Cinciidae (Dippers), Paul A. Johnsgard
Birds Of The Great Plains: Family Cinciidae (Dippers), Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
Dipper
Birds Of The Great Plains: Family Turdidae (Thrushes, Bluebirds, And Solitaires), Paul A. Johnsgard
Birds Of The Great Plains: Family Turdidae (Thrushes, Bluebirds, And Solitaires), Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
American Robin
Wood Thrush
Hermit Thrush
Swainson Thrush
Veery
Eastern Bluebird
Mountain Bluebird
Townsend Solitaire
Birds Of The Great Plains: Family Ploceidae (Old World Sparrows And Weaver Finches), Paul A. Johnsgard
Birds Of The Great Plains: Family Ploceidae (Old World Sparrows And Weaver Finches), Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
House Sparrow (English Sparrow)
Birds Of The Great Plains: Appendix A -- A Guide To Bird-Watching Localities In The Great Plains, Paul A. Johnsgard
Birds Of The Great Plains: Appendix A -- A Guide To Bird-Watching Localities In The Great Plains, Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
Partly on the basis of the availability of relatively complete bird lists available for the areas, I have included here forty-four state and federal parks, refuges, and other sanctuaries located within the region covered by this book. Nearly all the national wildlife refuges are included, except a number of smaller refuges for which bird lists are not available. Further, a group of four North Dakota national wildlife refuges in the Souris Valley is collectively considered in a "Souris Loop" category. In the discussion that follows and the associated list of summer birds, the localities are grouped by states, and the …
Birds Of The Great Plains: Index, Paul A. Johnsgard
Birds Of The Great Plains: Index, Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
A 5-page index of species (by common name).
Birds Of The Rocky Mountains With Particular Reference To National Parks In The Northern Rocky Mountain Region, Paul A. Johnsgard
Birds Of The Rocky Mountains With Particular Reference To National Parks In The Northern Rocky Mountain Region, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Notwithstanding the great latitudinal spread and the equally wide altitudinal variations that occur in the region, the Rocky Mountains contain surprisingly uniform bird life. A bird-watcher in Banff or Jasper national parks in Alberta will encounter the vast majority of the same breeding species in the coniferous zones of those areas as one who is observing nearly a thousand miles to the south in Rocky Mountain National Park, although particular bird species would occur at considerably different altitudes.
This comprehensive reference work describes in detail 354 species found in a 353,000-square-mile area—from the 40th parallel in Colorado north to the …
Birds Of The Rocky Mountains—Species Accounts, Pages 64-65: Pelicans & Cormorants, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 64-65: Pelicans & Cormorants, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
American White Pelican (Pelecanus erythrorhynchus)
Double-crested Cormorant (Phalacrocorax auritus)
Birds Of The Rocky Mountains—Species Accounts, Pages 76–109: Swans, Geese And Ducks, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 76–109: Swans, Geese And Ducks, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Tundra (Whistling) Swan (Cygnus columbianus)
Trumpeter Swan (Cygnus buccinator)
Greater White-fronted Goose (Anser albifrons)
Snow Goose (Chen caerulescens)
Ross' Goose (Chen rossii)
Canada Goose (Branta canadensis)
Wood Duck (Aix sponsa)
Green-winged Teal (Anas crecca)
American Black Duck (Anas rubripes)
Mallard (Anas platyrhynchos)
Northern Pintail (Anas acuta)
Blue-winged Teal (Anas discors)
Cinnamon Teal (Anas cyanoptera)
Northern Shoveler (Anas clypeata)
Gadwall (Anas strepera)
Eurasian Wigeon (Anas penelope)
American Wigeon (Anas americana)
Canvasback (Aythya valisineria)
Redhead (Aythya americana)
Ring-necked Duck (Aythya collaris)
Greater Scaup (Aythya marila)
Lesser Scaup (Aythya affinis)
Harlequin Duck (Histrionicus histrionicus)
Oldsquaw (Clangula hyemalis)
Black Scoter (Melanitta nigra)
Surf Scoter …
Birds Of The Rocky Mountains—Species Accounts, Pages 110-129: Vultures, Hawks & Eagles, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 110-129: Vultures, Hawks & Eagles, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Turkey Vulture (Cathartes aura)
Osprey (Pandion haliaetus)
Bald Eagle (Haliaeetus leucocephalus)
Northern Harrier (Circus cyaneus)
Sharp-shinned Hawk (Accipiter striatus)
Cooper's Hawk (Accipiter velox)
Northern Goshawk (Accipiter gentilis)
Red-shouldered Hawk (Buteo lineatus)
Broad-winged Hawk (Buteo platypterus)
Swainson's Hawk (Buteo swainsoni)
Red-tailed Hawk (Buteo jamaicensis)
Ferruginous Hawk (Buteo regalis)
Rough-legged Hawk (Buteo lagopus)
Golden Eagle (Aquila chrysaetos)
American Kestrel (Falco sparverius)
Merlin (Falco columbarius)
Peregrine Falcon (Falco peregrinus)
Gyrfalcon (Falco rusticolus)
Prairie Falcon (Falco mexicanus)
Birds Of The Rocky Mountains—Species Accounts, Pages 129–141: Upland Gamebirds, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 129–141: Upland Gamebirds, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Wilson's Phalarope (Phalaropus tricolor)
Gray Partridge (Perdix perdix)
Chukar (Alectoris chukar)
Ring.necked Pheasant (Phasianus colchicus)
Spruce Grouse (Dendragapus canadensis)
Blue Grouse (Dendragapus obscurus)
Willow Ptarmigan (Lagopus lagopus)
White-tailed Ptarmigan (Lagopus leucurus)
Ruffed Grouse (Bonasa umbellus)
Sage Grouse (Centrocercus urophasianus)
Sharp-tailed Grouse (Tympanuchus phasianellus)
Wild Turkey (Meleagris gallopavo)
Bobwhite (Colinus virginianus)
Birds Of The Rocky Mountains—Species Accounts, Pages 142–182: Rails, Cranes, & Shorebirds, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 142–182: Rails, Cranes, & Shorebirds, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Virginia Rail (Rallus limicola)
Sora (Porzana carolina)
Common Moorhen (Gallinula chloropus)
American Coot (Fulica americana)
Sandhill Crane (Grus canadensis)
Whooping Crane (Orus americana)
Black-bellied Plover (Pluvialis squatarola)
Lesser Golden Plover (Pluvialis dominica)
Semipalmated Plover (Charadrius semipalmatus)
Killdeer (Charadrius vociferus)
Mountain Plover (Charadrius montanus)
Black-necked Stilt (Himantopus mexicanus)
American Avocet (Recurvirostra americana)
Greater Yellowlegs (Tringa melanoleuca)
Lesser Yellowlegs (Tringa flavipes)
Solitary Sandpiper (Tringa solitaria)
Willet (Catoptrophorus semipalmatus)
Wandering Tattler (Heteroscelus incanus)
Spotted Sandpiper (Actitus macularia)
Upland Sandpiper (Bartramia longicauda)
Long-billed Curlew (Numenius americanus)
Hudsonian Godwit (Limosa haemastica)
Marbled Godwit (Limosa fedoa)
Ruddy Turnstone (Arenaria interpres)
Black Turnstone (Arenaria melanocephala)
Sanderling (Calidris …
Birds Of The Rocky Mountains—Species Accounts, Pages 183–196: Jaegers, Gulls, & Terns, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 183–196: Jaegers, Gulls, & Terns, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Pomarine Jaeger (Stercorarius pomarinus)
Parasitic Jaeger (Stercorarius parasiticus)
Long-tailed Jaeger (Stercorarius longicaudus)
Franklin's Gull (Larus pipixcan)
Bonaparte's Gull (Larus philadelphia)
Mew Gull (Larus tanus)
Ring-billed Gull (Larus delawarensis)
California Gull (Larus califomicus)
Herring Gull (Larus argentatus)
Sabine's Gull (Xema sabini)
Caspian Tern (Sterna caspia)
Common Tern (Sterna hirundo)
Forster's Tern (Sterna forsteri)
Black Tern (Chlicionias niger)
Birds Of The Rocky Mountains—Species Accounts, Pages 197–215: Doves And Owls, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 197–215: Doves And Owls, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Rock Dove (Columba livia)
Band-tailed Pigeon (Columba fasciata)
Mourning Dove (Zenaida macroura)
Black-billed Cuckoo (Coccyzus erythropthalmus)
Yellow-billed Cuckoo (Coccyzus americanus)
Flammulated Owl (Otus flammeolus)
Western Screech-owl (Otus kennicottii)
Great Horned Owl (Bubo virginianus)
Snowy Owl (Nyctea scandiaca)
Northern Hawk-owl (Sumia ulula)
Northern Pygmy-owl (Glaucidium gnoma)
Burrowing Owl (Athene cunicularia)
Barred Owl (Strix varia)
Great Gray Owl (Strix nebulosa)
Long-eared Owl (Asio otus)
Short-eared Owl (Asio flammeus)
Boreal Owl (Aegolius funereus)
Northern Saw-whet Owl (Aegolius acadicus)
Birds Of The Rocky Mountains—Species Accounts, Pages 229–241: Kingfishers & Woodpeckers, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 229–241: Kingfishers & Woodpeckers, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Belted Kingfisher (Ceryle alcyon)
Lewis's Woodpecker (Melanerpes lewis)
Red-headed Woodpecker (Melanerpes erythrocephala)
Acorn Woodpecker (Melanerpes formicivorus)
Yellow-bellied Sapsucker (Sphyrapicus varius)
Williamson's Sapsucker (Sphyrapicus thyroides)
Downy Woodpecker (Picoides pubescens)
Hairy Woodpecker (Picoides villosus)
White-headed Woodpecker (Picoides albolarvatus)
Three-toed Woodpecker (Picoides tridactylus)
Black-backed Woodpecker (Picoides arcticus)
Northern Flicker (Colaptes auritus)
Pileated Woodpecker (Dryocopus pileatus)
Birds Of The Rocky Mountains—Species Accounts, Pages 242–261: Flycatchers & Larks, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 242–261: Flycatchers & Larks, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Olive-sided Flycatcher (Contopus borealis)
Western Wood"pewee (Contopus sordidulus)
Yellow"bellied Flycatcher (Empidonax flaviventris)
Alder Flycatcher (Empidonax alnorum)
Willow Flycatbher (Empidonax trailli)
Least Flycatcher (Empidonax minimus)
Hammond's Flycatcher (Empidonax hammondi)
Dusky Flycatcher (Empidonax oberholseri)
Gray Flycatcher (Empidonax wrightii)
Western Flycatcher (Empidonax difficilis)
Eastern Phoebe (Sayornis phoebe)
Say's Phoebe (Sayornis saya)
Vermilion Flycatcher (Pyrocephalus rubinus)
Ash-throated Flycatcher (Myiarchus cinerascens)
Cassin's Kingbird (Tyrannus vociferus)
Western Kingbird (Tyrannus verticalis)
Eastern Kingbird (Tyrannus tyrannus)
Scissor-tailed Flycatcher (Muscivora forficata)
Horned Lark (Eremophila alpestris)
Birds Of The Rocky Mountains—Species Accounts, Pages 262–277: Swallows, Jays, & Crows, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 262–277: Swallows, Jays, & Crows, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Purple Martin (Progne subis)
Tree Swallow (Iridoprocne bicolor)
Violet-green Swallow (Tachycineta thalassina)
Northern Rough-winged Swallow (Stelgidopteryx ruficollis)
Bank Swallow (Riparia riparia)
Cliff Swallow (Petrochelidon pyrrhonota)
Barn Swallow (Hirundo rusticola)
Gray Jay (Perisoreus canadensis)
Steller's Jay (Cyanocitta stelleri)
Blue Jay (Cyanocitta cristata)
Scrub Jay (Aphelocoma caerulescens)
Pinyon Jay (Gymnorhinus cyanocephalus)
Clark's Nutcracker (Nucifraga columbiana)
Black-billed Magpie (Pica pica)
American Crow (Corvus brachyrhynchos)
Common Raven (Corvus corax)
Birds Of The Rocky Mountains—Species Accounts, Pages 278–286: Titmice & Nuthatches, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 278–286: Titmice & Nuthatches, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Black-capped Chickadee (Parus atricapillus)
Mountain Chickadee (Parus gambelii)
Boreal Chickadee (Parus hudsonicus)
Chestnut-backed Chickadee (Parus rufescens)
Plain Titmouse (Parus inornatus)
Bushtit (Psaltriparus minimus)
Red-breasted Nuthatch (Sitta canadensis)
White-breasted Nuthatch (Sitta carolinensis)
Pygmy Nuthatch (Sitta pygmaea)
Birds Of The Rocky Mountains—Species Accounts, Pages 287–297: Creepers & Wrens, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 287–297: Creepers & Wrens, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Brown Creeper (Certhia familiaris)
Rock Wren (Salpinctes obsoletus)
Canyon Wren (Caltherpes mexicanus)
Bewick's Wren (Thyromanes bewickii)
House Wren (Troglodytes aedon)
Winter Wren (Troglodytes troglodytes)
Marsh Wren (Cistothorus palustris)
American Dipper (Cinclus mexicanus)
Golden-crowned Kinglet (Regulus satrapa)
Ruby-crowned Kinglet (Regulus calendula)
Blue-gray Gnatcatcher (Polioptila caerulea)
Birds Of The Rocky Mountains—Species Accounts, Pages 298–313: Thrushes, Thrashers, & Pipits, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 298–313: Thrushes, Thrashers, & Pipits, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Eastern Bluebird (Sialia sialis)
Western Bluebird (Sialia mexicana)
Mountain Bluebird (Sialia currucoides)
Townsend's Solitaire (Myadestes townsendi)
Veery (Catharus fuscescens)
Gray-cheeked Thrush (Catharus minimus)
Swainson's Thrush (Catharus ustulatus)
Hermit Thrush (Catharus guttatus)
American Robin (Turdus migratorius)
Varied Thrush (Ixoreus naevius)
Gray Catbird (Dumatella carolinensis)
Northern Mockingbird (Mimus polyglottos)
Sage Thrasher (Oreoscoptes montanus)
Brown Thrasher (Toxostoma rufum)
Water Pipit (Anthus spinoletta)
Sprague's Pipit (An thus spraguei)
Birds Of The Rocky Mountains—Species Accounts, Pages 314–322: Waxwings, Shrikes, & Vireos, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 314–322: Waxwings, Shrikes, & Vireos, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Bohemian Waxwing (Bombycilla garrulus)
Cedar Waxwing (Bombycilla cedrorum)
Northern Shrike (Lanius excubitor)
Loggerhead Shrike (Lanius ludovicianus)
European Starling (Sturnus vulgaris)
Solitary Vireo (Vireo solitarius)
Warbling Vireo (Vireo gilvus)
Philadelphia Vireo (Vireo philadelphicus)
Red~eyed Vireo (Vireo olivaceous)
Birds Of The Rocky Mountains—Species Accounts, Pages 354–392: Tanagers, Grosbeaks, & Sparrows, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 354–392: Tanagers, Grosbeaks, & Sparrows, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Hepatic Tanager (Piranga flava)
Scarlet Tanager (Piranga olivacea)
Western Tanager (Piranga ludoviciana)
Rose-breasted Grosbeak (Pheuticus ludovicianus)
Black-headed Grosbeak (Pheucticus melanocephalus)
Blue Grosbeak (Guiraca caerulea)
Lazuli Bunting (Passerina amoena)
Indigo Bunting (Passerina cyanea)
Dickcissel (Spiza americana)
Green-tailed Towhee (Pipilo chlorurus)
Rufous-sided Towhee (Pipilo erythropthalma)
Brown Towhee (Pipilo fuscus)
American Tree Sparrow (Spizella arborea)
Chipping Sparrow (Spizella passerina)
Clay-colored Sparrow (Spizella pallida)
Brewer's Sparrow (Spizella breweri)
Field Sparrow (Spizella pusilla)
Vesper Sparrow (Pooecetes gramineus)
Lark Sparrow (Chondestes grammacus)
Black-throated Sparrow (Amphispiza lineata)
Sage Sparrow (Amphispiza belli)
Lark Bunting (Calamospiza melanocorys)
Savannah Sparrow (Passerculus sandwichensis)
Baird's Sparrow (Ammodramus bairdii)
Grasshopper Sparrow (Ammodramus savannarum) …
Birds Of The Rocky Mountains—References On Individual Species, Paul A. Johnsgard
Birds Of The Rocky Mountains—References On Individual Species, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Approximately 650 reference (through 1986). See "Supplement" for additional references to 2009.
Birds Of The Rocky Mountains—Appendix: Abundance And Breeding Information For U.S. And Canadian National Parks, Paul A. Johnsgard
Birds Of The Rocky Mountains—Appendix: Abundance And Breeding Information For U.S. And Canadian National Parks, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
36 pages.
Covering
Banff National Park
Yoho National Park
Kootenay National Park
Waterton Lakes National Park
Glacier National Park
Yellowstone National Park
Grand Teton National Park
Rocky Mountain National Park
Dinosaur National Monument
Birds Of The Rocky Mountains—Index, Paul A. Johnsgard
Birds Of The Rocky Mountains—Index, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
This index includes the common names of bird species mentioned in this book, with the principal species account indicated by italics. Some names that previously have been used as common names but which no longer are used, or apply only to forms now considered subspecies, have also been indexed.
Birds Of The Rocky Mountains—Color Plates 1 - 42, Paul A. Johnsgard
Birds Of The Rocky Mountains—Color Plates 1 - 42, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Plate 1. Spruce grouse, displaying male. Photo by author.
Plate 2. American white pelicans and Caspian terns, breeding colony on Yellowstone Lake. Photo by author.
Plate 3. Double-crested cormorant and California gulls, breeding colony on Yellowstone Lake. Photo by author.
Plate 4. Trumpeter swan, adult and cygnets. Photo by author.
Plate 5. Harlequin duck, male. Photo by author.
Plate 6. Barrow’s goldeneye, female and brood. Photo by author.
Plate 7. Common merganser, female and brood. Photo by author.
Plate 8. Osprey, adult. Photo by author.
Plate 9. Red-tailed hawk, adult. Photo by author.
Plate 10. Golden eagle, adult. Photo by …
Birds Of The Rocky Mountains—Species Accounts, Pages 392–416: Icterids, Finches, & House Sparrows, Paul A. Johnsgard
Birds Of The Rocky Mountains—Species Accounts, Pages 392–416: Icterids, Finches, & House Sparrows, Paul A. Johnsgard
Birds of the Rocky Mountains by Paul A. Johnsgard
Bobolink (Dolichonyx oryzivorus)
Red-winged Blackbird (Agelaius phoeniceus)
Western Meadowlark (Sturnella neglecta)
Yellow-headed Blackbird (Xanthocephalus xanthocephalus)
Rusty Blackbird (Euphagus carolinus)
Brewer's Blackbird (Euphagus cyanocephalus)
Common Grackle (Quiscalus quiscula)
Brown-headed Cowbird (Molothrus ater)
Orchard Oriole (Icterus spurius)
Northern Oriole (Icterus galbula)
Rosy Finch (Leucosticte arctoa)
Pine Grosbeak (Pinicola enucleator)
Purple Finch (Carpodacus purpureus)
Cassin's Finch (Carpodacus cassinii)
House Finch (Carpodacus mexicanus)
Red Crossbill (Loxia curvirostra)
White~winged Crossbill (Loxia leucoptera)
Common Redpoll (Carduelis flammeus)
Hoary Redpoll (Carduelis homemanni)
Pine Siskin (Spinus pinus)
Lesser Goldfinch (Carduelis psaltria)
American Goldfinch (Carduelis tristis)
Evening Grosbeak (Hesperiphona vespertina)
House Sparrow (Passer domesticus)
Block & Bridle Club 2008-2009 Annual
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Cooperation And Competition: Nepotistic Tolerance And Intrasexual Aggression In Western Bluebird Winter Groups, Janis L. Dickinson, Melody Euaparadorn, Katherine Greenwald, Chandreyee Mitra, Daizaburo Shizuka
Cooperation And Competition: Nepotistic Tolerance And Intrasexual Aggression In Western Bluebird Winter Groups, Janis L. Dickinson, Melody Euaparadorn, Katherine Greenwald, Chandreyee Mitra, Daizaburo Shizuka
Papers in Ornithology
Two hypothesized benefits of delayed dispersal are access to resources and prolonged brood care (or parental nepotism). Resource abundance (mistletoe wealth) is a key factor influencing whether sons stay home in western bluebirds, Sialia mexicana, but nepotism is also observed. Western bluebird sons commonly remain in their family groups throughout the winter, whereas daughters usually disperse before winter. Because pairing often takes place in winter groups, with newly formed pairs settling on exclusive all-purpose territories in spring, selection for sexual competition and nepotism co-occur and may simultaneously influence patterns of aggression within groups. We measured aggression at mealworm feeder …