The picture you sent me is of the pelvis and spine of an animal. It shows the pelvic bone, the sacral (the part connecting the pelvic bone and spine with four holes in it), and the spine. It was easy to tell that this bone was from a big animal and from a mammal (because the pelvis anatomy closely identifies with that of a human).

These bones are very similar to those of a cow or a deer; it largely depends on where these bones were found to tell which animal's bones there are exactly. I hope this answers your question!