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Abert’s Towhee Acadian Flycatcher Acorn Woodpecker Alder Flycatcher Allen’s Hummingbird Altamira Oriole American Avocet American Bittern American Black Duck American Coot American Crow American Dipper American Golden-Plover American Goldfinch American Kestrel American Oystercatcher American Pipit American Redstart American Robin American Three-toed Woodpecker American Tree Sparrows American White Pelican American Wigeon American Woodcock Anhinga Anna’s Hummingbird Arctic Tern Arizona Woodpecker Ash-Throated Flycatcher Atlantic Puffin Audubon’s Oriole Bachman’s Sparrow Baird’s Sandpiper Baird’s Sparrow Bald Eagle Baltimore Oriole Band-tailed Pigeon Bank Swallow Barn Owl Barn Swallow Barred Owl Barrow’s Goldeneye Bay-breasted Warbler Bell’s Vireo Belted Kingfisher Bendire’s Thrasher Bewick’s Wren Black Guillemot Black Oystercatcher Black Phoebe Black Rail Black Rosy-Finch Black Scoter Black Skimmer Black Swift Black Tern Black Turnstone Black Vulture Black-and-white Warbler Black-backed Woodpecker Black-bellied Plover Black-bellied Whistling-Duck Black-billed Cuckoo Black-billed Magpie Black-capped Chickadee Black-capped Vireo Black-chinned Hummingbird Black-chinned Sparrow Black-crested Titmouse Black-crowned Night-Heron Black-footed Albatross Black-headed Grosbeak Black-legged Kittiwake Black-necked Stilt Black-throated Blue Warbler Black-throated Gray Warbler Black-throated Green Warbler Black-throated Sparrow Blackburnian Warbler Blackpoll Warbler Blue Grosbeak Blue Jay Blue-footed Booby Blue-gray Gnatcatcher Blue-headed Vireo Blue-throated Hummingbird Blue-winged Teal Blue-winged Warbler Boat-tailed Grackle Bobolink Bohemian Waxwing Bonaparte’s Gull Boreal Chickadee Boreal Owl Botteri’s Sparrow Brandt’s Cormorant Brant Brewer’s Blackbird Brewer’s Sparrow Bridled Titmouse Broad-billed Hummingbird Broad-tailed Hummingbird Broad-winged Hawk Bronzed Cowbird Brown Booby Brown Creeper Brown Pelican Brown Thrasher Brown-capped Rosy-Finch Brown-headed Cowbird Brown-headed Nuthatch Buff-bellied Hummingbird Buff-breasted Flycatcher Buff-breasted Sandpiper Bufflehead Bullock’s Oriole Burrowing Owl Bushtit Cackling Goose Cactus Wren California Condor California Gull California Quail California Thrasher California Towhee Calliope Hummingbird Canada Goose Canada Jay (Previously Gray Jay) Canada Warbler Canvasback Canyon Towhee Canyon Wren Cape May Warbler Carolina Chickadee Carolina Wren Caspian Tern Cassin’s Auklet Cassin’s Finch Cassin’s Kingbird Cassin’s Sparrow Cassin’s Vireo Cattle Egret Cave Swallow Cedar Waxwing Cerulean Warbler Chestnut-backed Chickadee Chestnut-collared Longspur Chestnut-sided Warbler Chihuahuan Raven Chimney Swift Chipping Sparrow Chuck-will’s-widow Chukar Cinnamon Teal Clapper Rail Clark’s Grebe Clark’s Nutcracker Clay-colored Sparrow Cliff Swallow Colima Warbler Common Eider Common Gallinule Common Goldeneye Common Grackle Common Ground-Dove Common Loon Common Merganser Common Murre Common Nighthawk Common Pauraque Common Poorwill Common Raven Common Redpoll Common Tern Common Yellowthroat Connecticut Warbler Cooper’s Hawk Cordilleran Flycatcher Costa’s Hummingbird Couch’s Kingbird Crescent-chested Warbler Crested Caracara Crissal Thrasher Curve-billed Thrasher Dark-eyed Junco Dickcissel Double-crested Cormorant Dovekie Downy Woodpecker Dunlin Dusky Flycatcher Dusky Grouse Eared Grebe Eastern Bluebird Eastern Kingbird Eastern Meadowlark Eastern Phoebe Eastern Screech-Owl Eastern Towhee Eastern Whip-poor-will Eastern Wood-Pewee Elegant Tern Elf Owl Emperor Goose Eurasian Collared-Dove Eurasian Tree Sparrow Eurasian Wigeon European Starling Evening Grosbeak Ferruginous Hawk Field Sparrow Fish Crow Flammulated Owl Florida Scrub-Jay Forster’s Tern Fox Sparrow Franklin’s Gull Fulvous Whistling-Duck Gadwall Gambel’s Quail Gila Woodpecker Gilded Flicker Glaucous Gull Glaucous-winged Gull Glossy Ibis Golden Eagle Golden-cheeked Warbler Golden-crowned Kinglet Golden-crowned Sparrow Golden-crowned Warbler Golden-fronted Woodpecker Golden-winged Warbler Grace’s Warbler Grasshopper Sparrow Gray Catbird Gray Flycatcher Gray Kingbird Gray Partridge Gray Vireo Gray-cheeked Thrush Gray-crowned Rosy-Finch Great Black-backed Gull Great Blue Heron Great Cormorant Great Crested Flycatcher Great Egret Great Gray Owl Great Horned Owl Great Kiskadee Great-tailed Grackle Greater Pewee Greater Prairie-Chicken Greater Roadrunner Greater Sage-Grouse Greater Scaup Greater White-fronted Goose Greater Yellowlegs Green Heron Green Jay Green-tailed-towhee Green-winged Teal Groove-billed Ani Gull-billed Tern Gunnison Sage-Grouse Gyrfalcon Hairy Woodpecker Hammond’s Flycatcher Harlequin Duck Harris’s Hawk Harris’s Sparrow Heermann’s Gull Henslow’s Sparrow Hepatic Tanager Hermit Thrush Hermit Warbler Herring Gull Hoary Redpoll Hooded Merganser Hooded Oriole Hooded Warbler Horned Grebe Horned Lark Horned Puffin House Finch House Sparrow House Wren Hudsonian Godwit Hutton’s Vireo Inca Dove Indigo Bunting Ivory-billed Woodpecker Juniper Titmouse Kentucky Warbler Killdeer King Eider King Rail Kirtland’s Warbler Ladder-backed Woodpecker Lapland Longspur Lark Bunting Lark Sparrow Laughing Gull Lawrence’s Goldfinch Lazuli Bunting Le Conte’s Sparrow Le Conte’s Thrasher Least Bittern Least Flycatcher Least Grebe Least Sandpiper Least Tern Lesser Black-backed Gull Lesser Goldfinch Lesser Prairie-Chicken Lesser Scaup Lesser Yellowlegs Lewis’s Woodpecker Limpkin Lincoln’s Sparrow Little Blue Heron Loggerhead Shrike Long-billed Curlew Long-billed Dowitcher Long-eared Owl Long-tailed Duck Louisiana Waterthrush Lucifer Hummingbird Lucy’s Warbler MacGillivray’s Warbler Magnificent Frigatebird Magnificent Hummingbird Magnolia Warbler Mallard Mangrove Cuckoo Marbled Godwit Marsh Wren Masked Duck McCown’s Longspur Merlin Mew Gull Mexican Jay Mississippi Kite Montezuma Quail Mottled Duck Mountain Bluebird Mountain Chickadee Mountain Plover Mountain Quail Mourning Dove Mourning Warbler Mute Swan Nashville Warbler Neotropic Cormorant Northern Bobwhite Northern Cardinal Northern Flicker Northern Fulmar Northern Gannet Northern Goshawk Northern Harrier Northern Hawk Owl Northern Mockingbird Northern Parula Northern Pintail Northern Rough-winged Swallow Northern Saw-whet Owl Northern Shoveler Northern Shrike Northern Waterthrush Northwestern Crow Nuttall’s Woodpecker Oak Titmouse Olive-sided Flycatcher Orange-crowned Warbler Orchard Oriole Osprey Ovenbird Pacific Golden-Plover Pacific Loon Pacific-slope Flycatcher Painted Bunting Painted Redstart Palm Warbler Pectoral Sandpiper Pelagic Cormorant Peregrine Falcon Phainopepla Philadelphia Vireo Pied-billed Grebe Pigeon Guillemot Pileated Woodpecker Pine Grosbeak Pine Siskin Pine Warbler Pinyon Jay Piping Plover Plain Chachalaca Plumbeous Vireo Prairie Falcon Prairie Warbler Prothonotary Warbler Purple Finch Purple Gallinule Purple Martin Purple Sandpiper Pygmy Nuthatch Pyrrhuloxia Razorbill Red Crossbill Red Knot Red Phalarope Red-bellied Woodpecker Red-breasted Merganser Red-breasted Nuthatch Red-breasted Sapsucker Red-cockaded Woodpecker Red-eyed Vireo Red-faced Warbler Red-headed Woodpecker Red-naped Sapsucker Red-necked Grebe Red-necked Phalarope Red-shouldered Hawk Red-tailed Hawk Red-throated Loon Red-winged Blackbird Reddish Egret Redhead Ring-billed Gull Ring-necked Duck Ring-necked Pheasant Rock Pigeon Rock Ptarmigan Rock Sandpiper Rose-breasted Grosbeak Roseate Spoonbill Roseate Tern Ross’s Goose Rough-legged Hawk Royal Tern Ruby-crowned Kinglet Ruby-throated Hummingbird Ruddy Duck Ruddy Turnstone Ruffed Grouse Rufous Hummingbird Rufous-capped Warbler Rufous-winged Sparrow Rusty Blackbird Sabine’s Gull Sage Sparrow Sage Thrasher Saltmarsh Sharp-tailed Sparrow Sanderling Sandhill Crane Sandwich Tern Savannah Sparrow Say’s Phoebe Scaled Quail Scarlet Tanager Scissor-tailed Flycatcher Scott’s Oriole Seaside Sparrow Sedge Wren Semipalmated Plover Semipalmated Sandpiper Sharp-shinned Hawk Sharp-tailed Grouse Short-billed Dowitcher Short-eared Owl Slate-throated Redstart Smith’s Longspur Smooth-billed Ani Snail Kite Snow Bunting Snow Goose Snowy Egret Snowy Plover Solitary Sandpiper Song Sparrow Sooty Grouse Sora Spotted Owl Spotted Sandpiper Spotted Towhee Sprague’s Pipit Spruce Grouse Steller’s Jay Stilt Sandpiper Summer Tanager Surf Scoter Surfbird Swainson’s Hawk Swainson’s Thrush Swainson’s Warbler Swallow-tailed Kite Swamp Sparrow Tennessee Warbler Thick-billed Murre Townsend’s Solitaire Townsend’s Warbler Tree Swallow Tricolored Heron Tropical Kingbird Trumpeter Swan Tufted Puffin Tufted Titmouse Tundra Swan Turkey Vulture Upland Sandpiper Varied Bunting Varied Thrush Vaux’s Swift Veery Verdin Vermilion Flycatcher Vesper Sparrow Violet-green Swallow Virginia Rail Virginia’s Warbler Warbling Vireo Western Bluebird Western Grebe Western Gull Western Kingbird Western Sandpiper Western Screech-Owl Western Tanager Western Wood-Pewee Western-Meadowlark Whimbrel White Ibis White-breasted Nuthatch White-crowned Pigeon White-crowned Sparrow White-eyed Vireo White-faced Ibis White-headed Woodpecker White-rumped Sandpiper White-tailed Hawk White-tailed Kite White-tailed Ptarmigan White-throated Sparrow White-throated Swift White-tipped Dove White-winged Crossbill White-winged Dove White-winged Scoter Whooping Crane Wild Turkey Willet Williamson’s Sapsucker Willow Flycatcher Willow Ptarmigan Wilson’s Phalarope Wilson’s Plover Wilson’s Snipe Wilson’s Warbler Winter Wren Wood Duck Wood Stork Wood Thrush Woodhouse’s Scrub-Jay Worm-eating Warbler Wrentit Yellow Rail Yellow Warbler Yellow-bellied Flycatcher Yellow-bellied Sapsucker Yellow-billed Cuckoo Yellow-billed Magpie Yellow-breasted Chat Yellow-crowned Night-Heron Yellow-headed Blackbird Yellow-rumped Warbler Yellow-throated Vireo Yellow-throated Warbler Zone-tailed Hawk

Search by Body Shape
Search by Body Shape Facts IDENTIFICATION Bird Identification Birding Popular

A bird’s shape (silhouette) and posture are good clues to its identity. In fact, silhouette and posture are often excellent clues and the best way to differentiate some very similar species.

This section (links on the right) features birds with certain strong characteristics. The images below demonstrate a more subtle example of shape differences.

The Birdzilla.com Shape Master will help you improve your skills in identifying birds by silhouette and posture.

greater scaup

Greater Scaup

One of the keys in telling the Greater Scaup (above) from the Lesser Scaup (below) is the shape of the head.

  • The Greater Scaup has a rounded head.
  • The forehead on the Greater Scaup is more sloped than the Lesser Scaup.
  • The head of the Lesser Scaup is more peaked.
  • The Lesser Scaup often shows a small tuft on the back of the head.
  • The cleaner sides of the Greater Scaup are often not visible at a distance, leaving the viewer to rely on head shape to make the call.
lesser scaup

Lesser Scaup

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Birds With Long Legs

Birds With Long Bills

Birds with Hooked Beaks

Birds With Pointed Bills
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