The Exotic Birds Minecraft forum page contains a lot more information: Minecraft Forums

This mod adds in more than 30 new birds to your Minecraft world, spawning in a variety of different biomes. Hear woodpeckers pecking high up in the trees, see swans swimming about in rivers, or listen to the lyrebird mimicking its environment. This mod helps to bring your world to life!

The mod features a wide range of new birds, including:
Blue Jay
Blue-footed Booby
Cardinal
Cassowary
Crane
Duck
Flamingo
Gouldian Finch
Heron
Hummingbird
Kingfisher
Kiwi
Kookaburra
Lyrebird
Magpie
Ostrich
Owl
Parrot
Peafowl
Pelican
Penguin
Phoenix
Pigeon
Roadrunner
Robin
Seagull
Swan
Toucan
Vulture
Woodpecker

Birds can be found spawning in the world or can be hatched from eggs found in nests, which generate upon trees in your world. Each bird also has multiple species, bringing the total number of birds to more than 100! 

A detailed bird encyclopedia gives you information and knowledge on the birds, such as their favourite food, their habitat, gender and variants. Use this book to try and log all the birds in your world!

The 1.12.2 version of this mod is compatible with the Bird's Nests mod.

If you'd like to keep up to date with the progress, you can join the Exotic Birds discord community. Suggestions and kind comments are very welcome! https://discord.gg/9S6NAjd

Thank you immensely to kellixon and pidrosax for the Russian and Spanish translations!