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:
Deer in lower left corner of image in field of teasel dipsacus sylvestris. en br Image title Deer Odocoileus species in lower left corner of image in field of teasel Dipsacus sylvestris Image from Public domain images website publicdomainimage html publicdomainimage Hagerty Ryan Fish and Wildlife Service Not given Transferred
Page 2017 Free-images.com. All images are Public Domain