Wildlife Spotting

looks like the lower jaw of a small mammal

It looks very similar to a rabbit or hare mandible (well part of one). I did a quick Google search to find some similar images. You would probably have to do some research on size to see if you could figure out which it is. https://www.google.com/search?q=rabbit+mandible&tbm=isch&source=iu&ictx=1&fir=LI9Mkmkej_iH-M%252C04wu_AWpaL2RZM%252C_&vet=1&usg=AI4_-kTBDGuNpsU0Og9xeY-ZGV_0varJ4g&sa=X&ved=2ahUKEwiFoa6gmNbuAhX3GVkFHeynDDwQ9QF6BAgGEAE&biw=1600&bih=789#imgrc=X7GsxeBVnIKOoM

Hello efgrak and welcome to the Project Noah community! Nice first spotting! Project Noah is a tool for people to learn about wildlife, share wildlife spotting's, build nature journals and engage in citizen science. Here you will find a friendly community of people passionate about wildlife and conservation. We are thrilled for you to join Project Noah. We hope you enjoy our website and community as much as us! Enjoy yourself, learn, share and I will see you around :)