Two things:
There is not much variety of skull references in stock. Especially animal skulls.
I have a bunch of animal skulls--most very clean and in good shape.

So, I decided to shoot some of what I have, in at least four views each, and post them as stock photos for other artists to use.

I hope they prove useful. Even more, I am hoping that whenever someone uses one of the images, s/he lets me see what they did with it.

Thus far I have uploaded:
Crow
Gull
Owl
Parrot
Beaver
Asian Water Dragon

Views include:
Dorsal--top
Ventral--bottom floor of the skull
Lateral--side view
Foreshortened--looking straight into the face. AKA frontal