Species Snow Goose Greater White-fronted Goose Canada Goose Mute Swan Trumpeter Swan Tundra Swan Wood Duck Blue-winged Teal Northern Shoveler Gadwall American Wigeon Mallard American Black Duck Northern Pintail Green-winged Teal Redhead Ring-necked Duck Greater Scaup Lesser Scaup Common Eider Harlequin Duck Surf Scoter White-winged Scoter White-winged/Stejneger's Scoter Black Scoter Long-tailed Duck Bufflehead Common Goldeneye Barrow's Goldeneye Hooded Merganser Common Merganser Red-breasted Merganser Ruddy Duck California Quail Wild Turkey Ruffed Grouse Band-tailed Pigeon Mourning Dove Yellow-billed Cuckoo Black-billed Cuckoo Common Nighthawk Chimney Swift Vaux's Swift Ruby-throated Hummingbird Virginia Rail Virginia Rail American Coot Sandhill Crane Black Oystercatcher Black-bellied Plover Killdeer Semipalmated Plover Short-billed Dowitcher American Woodcock Wilson's Snipe Spotted Sandpiper Solitary Sandpiper Lesser Yellowlegs Greater Yellowlegs Ruddy Turnstone Black Turnstone Sanderling Dunlin Least Sandpiper Western Sandpiper Semipalmated Sandpiper Parasitic Jaeger Rhinoceros Auklet Black Guillemot Pigeon Guillemot Common Murre Little Gull Black-legged Kittiwake Bonaparte's Gull Franklin's Gull Heermann's Gull Short-billed Gull Ring-billed Gull American Herring Gull Great Black-backed Gull Glaucous Gull California Gull Glaucous-winged Gull Iceland Gull Iceland Gull (Thayer's) Iceland Gull (kumlieni/glaucoides) Herring Gull Caspian Tern Black Tern Forster's Tern Arctic Tern Common Tern Pied-billed Grebe Horned Grebe Red-necked Grebe Red-throated Loon Pacific Loon Common Loon Northern Gannet Brandt's Cormorant Pelagic Cormorant Double-crested Cormorant American White Pelican American Bittern Black-crowned Night Heron Great Egret Great Blue Heron Turkey Vulture Osprey Golden Eagle Sharp-shinned Hawk Cooper's Hawk American Goshawk Northern Harrier Bald Eagle Broad-winged Hawk Red-tailed Hawk Rough-legged Hawk Northern Saw-whet Owl Belted Kingfisher Yellow-bellied Sapsucker Red-naped Sapsucker Red-headed Woodpecker Red-bellied Woodpecker American Three-toed Woodpecker Black-backed Woodpecker Downy Woodpecker Hairy Woodpecker Pileated Woodpecker Northern Flicker Northern Flicker American Kestrel Merlin Peregrine Falcon Olive-sided Flycatcher Western Wood-Pewee Eastern Wood-Pewee Yellow-bellied Flycatcher Alder/Willow Flycatcher (Traill's Flycatcher) Least Flycatcher Hammond's Flycatcher Dusky Flycatcher Western Flycatcher Eastern Phoebe Great Crested Flycatcher Western Kingbird Eastern Kingbird Hutton's Vireo Yellow-throated Vireo solitary vireo sp. Philadelphia Vireo Warbling Vireo Red-eyed Vireo Northern Shrike Canada Jay Steller's Jay Blue Jay Black-billed Magpie Clark's Nutcracker American Crow (Northwestern) American Crow Common Raven Black-capped Chickadee Mountain Chickadee Chestnut-backed Chickadee Boreal Chickadee Horned Lark Bank Swallow Tree Swallow Violet-green Swallow Purple Martin Northern Rough-winged Swallow Barn Swallow Cliff Swallow Ruby-crowned Kinglet Golden-crowned Kinglet White-breasted Nuthatch Red-breasted Nuthatch Brown Creeper Blue-gray Gnatcatcher Northern House Wren House Wren Winter Wren Pacific/Winter Wren Marsh Wren Carolina Wren Bewick's Wren European Starling Gray Catbird Brown Thrasher Northern Mockingbird Eastern Bluebird Townsend's Solitaire Varied Thrush Veery Gray-cheeked Thrush Swainson's Thrush Hermit Thrush Wood Thrush American Robin Bohemian Waxwing Cedar Waxwing House Sparrow American Pipit Siberian/American Pipit Evening Grosbeak Pine Grosbeak House Finch Purple Finch Redpoll (Common) Redpoll (flammea) Red Crossbill White-winged Crossbill Pine Siskin American Goldfinch Lapland Longspur Snow Bunting Chipping Sparrow Clay-colored Sparrow Field Sparrow American Tree Sparrow Fox Sparrow Dark-eyed Junco White-crowned Sparrow Golden-crowned Sparrow Harris's Sparrow White-throated Sparrow Vesper Sparrow Savannah Sparrow Song Sparrow Lincoln's Sparrow Swamp Sparrow Spotted Towhee Eastern Towhee Yellow-headed Blackbird Bobolink Western Meadowlark Eastern Meadowlark Orchard Oriole Baltimore Oriole Red-winged Blackbird Brown-headed Cowbird Rusty Blackbird Brewer's Blackbird Common Grackle Ovenbird Northern Waterthrush Blue-winged Warbler Black-and-white Warbler Tennessee Warbler Orange-crowned Warbler Nashville Warbler MacGillivray's Warbler Mourning Warbler Common Yellowthroat American Redstart Cape May Warbler Northern Parula Magnolia Warbler Bay-breasted Warbler Blackburnian Warbler Yellow Warbler Chestnut-sided Warbler Blackpoll Warbler Black-throated Blue Warbler Palm Warbler Pine Warbler Yellow-rumped Warbler Black-throated Gray Warbler Townsend's Warbler Black-throated Green Warbler Canada Warbler Wilson's Warbler Scarlet Tanager Western Tanager Northern Cardinal Rose-breasted Grosbeak Black-headed Grosbeak Indigo Bunting Season Spring Fall

 
The Trend Maps tool allows you to produce a map showing regional population trends for a selected species and season. Trends are calculated using the same period among sites (usually the 10 most recent years available). Only sites or regions with sufficient data are presented. To see more details about the trend at a site or region, simply click on a symbol. For more information about maps, click here.