It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
Mule deer herd mammals. Check categories October en br Image title Mule deer herd mammals Image from Public domain images website publicdomainimage html publicdomainimage Heffernan David Fish and Wildlife Service Not given Transferred by on This file is in public domain not copyrighted no rights reserved free for any use
Page 2017 Free-images.com. All images are Public Domain