Promoting the enjoyment, study, and conservation of Wisconsin's birds.

The WSO Review List indicates rare species that have occurred in Wisconsin but require documentation for acceptance into the state records.  As of March 1, 2018, detailed eBird reports will suffice as appropriate Review List species documentation. To read more about this policy, please click here. For birders who do not wish to eBird, you can fill out the Rare Bird Documentation Form for these species, or any species not on the list that would represent a first state record.  Completed forms are assessed by the WSO Records Committee.

Updated March 2018

  • To search, hit Ctrl-F and type part of the common name (e.g., duck) and press enter.

Black-bellied Whistling-Duck
Fulvous Whistling-Duck
Brant
Garganey
King Eider
Common Eider
Smew
Masked Duck
Willow Ptarmigan
Band-tailed Pigeon
Inca Dove
Common Ground-Dove
Groove-billed Ani
Chuck-will's-widow
Green Violetear
Green-breasted Mango
Anna's Hummingbird
Broad-billed Hummingbird
Black Rail
Purple Gallinule
Snowy Plover
Wilson's Plover
Long-billed Curlew
Black Turnstone
Ruff
Curlew Sandpiper
Purple Sandpiper (only away from Lake Michigan)
Western Sandpiper
Pomarine Jaeger
Parasitic Jaeger (only away from Great Lakes)
Long-tailed Jaeger
Dovekie
Thick-billed Murre
Ancient Murrelet
Black-legged Kittiwake (away from Great Lakes)
Ivory Gull
Sabine's Gull (away from Wisconsin Point)
Black-headed Gull
Ross's Gull
Laughing Gull (only away from Lake Michigan)
Black-tailed Gull
Mew Gull
California Gull
Slaty-backed Gull
Glaucous-winged Gull
Sooty Tern
Least Tern
White-winged Tern
Arctic Tern
Royal Tern
Wood Stork
Magnificent Frigatebird
Neotropic Cormorant
Anhinga
Brown Pelican
White Ibis
Glossy Ibis (only away from Horicon Marsh)
Roseate Spoonbill
Black Vulture
Swallow-tailed Kite
White-tailed Kite
Mississippi Kite
Harris's Hawk
Swainson's Hawk
Ferruginous Hawk
Barn Owl
Burrowing Owl
Boreal Owl
Lewis's Woodpecker
American Three-toed Woodpecker
Crested Caracara
Gyrfalcon
Prairie Falcon
Western Wood-Pewee
Dusky Flycatcher
Say's Phoebe
Vermilion Flycatcher
Ash-throated Flycatcher
Fork-tailed Flycatcher
Tropical/Couch's Kingbird
Gray Vireo
Clark's Nutcracker
Cave Swallow
Brown-headed Nuthatch
Rock Wren
Bewick's Wren
Mountain Bluebird
Curve-billed Thrasher
Sage Thrasher
Phainopepla
Brambling
Gray-crowned Rosy-Finch
Chestnut-collared Longspur
Smith's Longspur
Green-tailed Towhee
Spotted Towhee
Rufous-crowned Sparrow
Black-throated Sparrow
Lark Bunting
Baird's Sparrow
Golden-crowned Sparrow
Hooded Oriole
Streak-backed Oriole
Bullock's Oriole
Scott's Oriole
Great-tailed Grackle
Swainson's Warbler
MacGillivray's Warbler
Black-throated Gray Warbler
Townsend's Warbler
Hermit Warbler
Painted Redstart
Pyrrhuloxia
Black-headed Grosbeak
Lazuli Bunting
Painted Bunting