Species on the Review List must be acceptably documented before adding them to the official record. This List consists of all the birds that have either never or very rarely occurred in Ohio. There are currently over 9,000 of the former and 121 of the latter, a list of which follows:

Black-bellied Whistling-Duck
Fulvous Whistling-Duck
Trumpeter Swan (other than introduced birds)
Cinnamon Teal
Garganey
Tufted Duck
King Eider
Common Eider
Barrow’s Goldeneye
Pacific Loon
Western Grebe
Black-capped Petrel
Leach’s Storm-Petrel
Northern Gannet
Brown Pelican
Anhinga
Magnificent Frigatebird
Tricolored Heron
White Ibis
Glossy Ibis
White-faced Ibis
Roseate Spoonbill
Wood Stork
Swallow-tailed Kite
Mississippi Kite
Harris’s Hawk
Swainson’s Hawk
Gyrfalcon
Prairie Falcon
Yellow Rail
Black Rail
Purple Gallinule
Northern Lapwing
Snowy Plover
Wilson’s Plover
Piping Plover
Black-necked Stilt
Spotted Redshank
Eskimo Curlew
Long-billed Curlew
Red-necked Stint
Sharp-tailed Sandpiper
Curlew Sandpiper
Ruff
Eurasian Woodcock
Black-headed Gull
Heermann’s Gull
Mew Gull
California Gull
Ross's Gull
Ivory Gull
Sooty Tern
Least Tern
Large-billed Tern
Arctic Tern
Royal Tern
Parasitic Jaeger
Long-tailed Jaeger
Thick-billed Murre
Black Guillemot
Long-billed Murrelet
Ancient Murrelet
Atlantic Puffin
Eurasian Collared-Dove
White-winged Dove
Common Ground-Dove
Smooth-billed Ani
Groove-billed Ani
Northern Hawk Owl
Burrowing Owl
Great Gray Owl
Boreal Owl
Green Violet-ear
Anna’s Hummingbird
Calliope Hummingbird
White-throated Swift
Red-naped Sapsucker
Red-cockaded Woodpecker
Black-backed Woodpecker
Gray Flycatcher
Say’s Phoebe
Vermilion Flycatcher
Western Kingbird
Scissor-tailed Flycatcher
Loggerhead Shrike
Black-billed Magpie
Common Raven
Violet-green Swallow
Cave Swallow
Boreal Chickadee
Brown-headed Nuthatch
Rock Wren
Bewick’s Wren
Northern Wheatear
Mountain Bluebird
Townsend’s Solitaire
Varied Thrush
Sprague’s Pipit
Bohemian Waxwing
Black-throated Gray Warbler
Townsend’s Warbler
Kirtland’s Warbler
Swainson’s Warbler
Painted Redstart
Western Tanager
Green-tailed Towhee
Spotted Towhee
Bachman’s Sparrow
Black-throated Sparrow
Lark Bunting
Baird’s Sparrow
Harris’s Sparrow
Smith’s Longspur
Black-headed Grosbeak
Painted Bunting
Great-tailed Grackle
Bullock’s Oriole
Brambling
Gray-crowned Rosy-Finch
Pine Grosbeak
Hoary Redpoll

The OBRC considers changes to the Review List at its annual meetings. The List is compiled (beyond including all species never accepted for Ohio) by including all species averaging fewer than two records per year over the latest ten-year period, adding selected species that have averaged between two and three records per year in a similar span, then adding a few species difficult to verify (such as Ross’s Goose, of which hybrids are increasingly common) or those whose populations are declining precipitously even if they exceed other numerical criteria (no species are in the list for this reason now, though in recent years examples have included Piping Plover and Loggerhead Shrike).