Quote Originally Posted by goshawkr View Post
And there is also quite a bit of evidence that dosnt fall in line with this explanation either. For example, its not common, but not at all unheard of for a wild naturally imprinted raptor to pair up with another wild naturally imprinted raptor of another closely related species
There is a document / resource online somewhere of all the recorded accounts of wild hybrids.

Its very interesting and suggests circumstances & communication dominate visual stimulus