All birds comes to colibri

I found out that no mather what I write in suggestion box.

The birds when generated in Firefly 2, with each iteration looks more and more like Colibri.

Is the AI mode biased with Colibri birds ?

As the side note, the AI seems not to understand other parts of bird like beak, tail, feet.

The animals are often generated with additional wing, eye. Also very often without any feet.