(compiled with currently recommended 1.8 Forge Version 188.8.131.529)
Spawns in Mesa, Desert and Jungle biomes.
Drops feathers and, if in a jungle biome, maybe melon seeds.
Has 7 health.
Can be bred with melon seeds.
Imitates sounds from many different creatures and some noises.
Every Lyrebird generates its own sound list when spawned.
When breeding, baby Lyrebirds randomly inherit a sound from their parents.
Looks pretty good. Maybe you could make a 1.7.10 version as well.