On the one hand, they can make birds like cormorants or swans or cranes or pelicans because they don't need aviaries and can make less feathers because zoos cut the feathers of birds so that those- these fly and escape so it's a little easier. On the other hand, all those who need aviaries in order not to escape, such as raptors or parrots, are likely to be longer. He can make birds in several DLC like Africa or Birds which do not fly ... On the other hand I don't know how long it takes to make a single bird even if there are a lot of details to do. But I think that very soon there will be flying birds, you just have to believe in it and be pantient. And here's a list of birds we might inhave next DLC
1. Birds that don't fly like
Emu - Rhea - humbold penguin - kiwi
2. Pelicans and Flamingos and Cranes
Red Flamingos - Dalmatian Pelicans - Gray Pelicans - Brown Pelican - Crowned Crane - Japanese Crane
3. Cormorant and Northern Gannet
Great Cormorant - Blue-footed Booby
4. Herons and Storks and Alies
Gray Heron - Marabou - Nile shoe Shoebill - White Stork - Black Stork
5. Puffin and Penguin
Atlantic Puffin - Rockhopper penguin
6. Swans and Ducks and Geese
Black swan - Mute swan - Mandarin duck - Mallard duck - Snow goose
7. Turkey and Grouse
8. Ground hornbill because I have already seen in zoos without aviaries
1. Birds that don't fly like
Emu - Rhea - humbold penguin - kiwi
2. Pelicans and Flamingos and Cranes
Red Flamingos - Dalmatian Pelicans - Gray Pelicans - Brown Pelican - Crowned Crane - Japanese Crane
3. Cormorant and Northern Gannet
Great Cormorant - Blue-footed Booby
4. Herons and Storks and Alies
Gray Heron - Marabou - Nile shoe Shoebill - White Stork - Black Stork
5. Puffin and Penguin
Atlantic Puffin - Rockhopper penguin
6. Swans and Ducks and Geese
Black swan - Mute swan - Mandarin duck - Mallard duck - Snow goose
7. Turkey and Grouse
8. Ground hornbill because I have already seen in zoos without aviaries