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:
Anti bird strike film application. en br Image title Anti bird strike film application Image from Public domain images website publicdomainimage html publicdomainimage Billings Brett Fish and Wildlife Service Not given Transferred by on This file is in public domain not copyrighted no rights reserved free for any use You can
Page 2017 Free-images.com. All images are Public Domain