if we take into account the birds that may be in the zoos of the world, we would get a list of 50/60 species. From what I've seen that in most zoos there are usually:
3/4 species of cranes
3/4 species of storks
between 5 - 15 species of ducks, geese and swans (counting them together)
5/8 species of pigeons
3/5 species of pheasants
3/10 species of macaws, parrots, parakeets (counting them together)
3/6 species of ibis and herons (counting them together)
3/6 species of eagles and vultures (counting them together)
1/2 species of flamingo
1/2 species of pelican
3/4 species of owls
2/3 species of cockatoos
2/3 species of toucans
2/3 species of hornbills
And they also have several species of small birds
Coraciiformes (for example: Blue-bellied roller); Passerines (for example: Gouldian finch)
And I don't know if I forget something
3/4 species of cranes
3/4 species of storks
between 5 - 15 species of ducks, geese and swans (counting them together)
5/8 species of pigeons
3/5 species of pheasants
3/10 species of macaws, parrots, parakeets (counting them together)
3/6 species of ibis and herons (counting them together)
3/6 species of eagles and vultures (counting them together)
1/2 species of flamingo
1/2 species of pelican
3/4 species of owls
2/3 species of cockatoos
2/3 species of toucans
2/3 species of hornbills
And they also have several species of small birds
Coraciiformes (for example: Blue-bellied roller); Passerines (for example: Gouldian finch)
And I don't know if I forget something