Here's an updated list:
Zoos with closed areas or other bird flu-related restrictions
Abilene Zoo - Many bird species are off-exhibit
Bay Beach Wildlife Sanctaury - Raptor Trail is closed
Blank Park Zoo - Discovery Center is closed, all bird species throughout the zoo are off-exhibit
Brevard Zoo - Lorikeet and Cockatiel aviaries are closed
Buffalo Zoo - M&T Rainforest Falls is closed, most bird species throughout the zoo are off-exhibit
Buttonwood Park Zoo - Some bird species are off-exhibit
Cameron Park Zoo - Brazos River Country Aviary is closed, some outdoor bird species are off-exhibit
Cape May County Zoo - World of Birds is closed
Capron Park Zoo - Rainforest Building is closed
Cincinnati Zoo - World of Birds and Australasia are closed, most outdoor birds are off-exhibit
Columbian Park Zoo - Penguins are off-exhibit
Cosley Zoo - Some birds are off-exhibit
Dakota Zoo - Waterfowl are off-exhibit
Dallas Zoo - Forest Aviary and Birds Landing are closed, most bird species across the zoo are off-exhibit, warthogs and Red River Hogs are off-exhibit
Denver Zoo - All bird species throughout the zoo are off-exhibit
Detroit Zoo - All outdoor bird species are off-exhibit
Elmwood Park Zoo - Harmony Hideaway is closed, eagles have moved exhibits, Domestic Chickens are off-exhibit
Erie Zoo - Most bird species throughout the zoo are off-exhibit
Fort Worth Zoo - Some areas of the zoo are closed (anyone have any more specific info?)
Franklin Park Zoo - Children's Zoo Aviary and Aussie Aviary are closed, most bird species throughout the zoo are off-exhibit
Great Bend-Brit Spaugh Zoo - Most bird species are off-exhibit
Great Plains Zoo - All bird species throughout the zoo (except penguins and flamingos) are off-exhibit
Henry Vilas Zoo - Aviary is closed
John Ball Zoo - Some bird species are off-exhibit, including the eagles, owls, and chickens
Lincoln Children's Zoo - Aviary is closed, all bird species across the zoo (except birds of prey) are off-exhibit
Lincoln Park Zoo - McCormick Bird House is closed, all bird species throughout the zoo are off-exhibit
Maryland Zoo in Baltimore - Most outdoor bird species are off-exhibit
Memphis Zoo - Most bird species throughout the zoo are off-exhibit
Mesker Park Zoo - Amazonia Aviary and Budgie Aviary are closed, raptors, penguins, cranes, ostriches and emus are all off-exhibit
Miller Park Zoo - All outdoor bird species are off-exhibit
Milwaukee County Zoo - Herb and Nada Mahler Family Aviary is closed, all bird species throughout the zoo are off-exhibit
Niabi Zoo - "relocated and enhanced bird area biosecurity"
North Carolina Zoo - Aviary is closed
NEW Zoo - Wisconsin Trail Aviary is closed, all bird species in open-topped enclosures are off-exhibit
Oklahoma City Zoo - Outdoor aviaries are closed
Omaha's Henry Doorly Zoo - Simmons Aviary is closed
Peoria Zoo - "A few animals remain off-exhibit"
Pittsburgh Zoo - Some outdoor birds are off-exhibit
Philadelphia Zoo - McNeil Avian Center is closed, all outdoor bird species are off-exhibit
Potawatomi Zoo - All bird species throughout the zoo are off-exhibit
Potter Park Zoo - Parakeet Landing is closed, Broad-winged Hawk, Domestic Chicken, and Indian Peafowl are all off-exhibit
Ralph Mitchell Zoo - Waterfowl and macaws are off-exhibit
Red River Zoo - All bird species throughout the zoo are off-exhibit
Riverbanks Zoo - All bird species across the zoo (except penguins, flamingos, and those in the tropical portion of the bird house) are off-exhibit
Roger Williams Park Zoo - Some bird species are off-exhibit, including raptors, chickens, turkeys and peafowl
Rosamond Gifford Zoo - Aviary is closed
Saint Louis Zoo - Bird House and Cypress Swamp are closed, most outdoor bird species throughout the zoo are off-exhibit. Penguin and Puffin Coast is still open but has limited opening hours
Sedgwick County Zoo - All bird species across the zoo are off-exhibit
Stone Zoo - Most bird species throughout the zoo are off-exhibit
Sylvan Heights Bird Park - Visitors with frequent or recent contact with poultry or waterfowl are not allowed
Tanganyika Wildlife Park - Lorikeet Landing is closed
Utah's Hogle Zoo - Raptors (and possibly other birds) are off-exhibit
Washington Park Zoo - Many bird species are off-exhibit
Zoo Atlanta - Some bird species are off-exhibit
ZooBoise - Some birds are off-exhibit
Zoos which have removed their bird flu-related restrictions
Louisville Zoo