Well there are some people out there that have made presets of birds and such and they're pretty good ^^
It might be difficult since we need the source code & it might take away the purpose / feel of Feral-Heart , but it does sound like a nice little idea all the same c:
Neat little idea here. But as Hakumi stated, there are plenty of really good bird based preset textures. And there will probably be a mod created for movements like that. ^^