This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Martesmartesskull. Pine marten skull no Pine marten skull Furbearing animals monograph of North American Mustelidae by Elliott Coues Lo Martes martes skulls
Page 2023 Free-images.com. All images are Public Domain