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Photo attributed to Raju Jangid. This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license. No endorsement implied. 

This work has been released into the public domain by its author, Nelson48 at English Wikipedia. This applies worldwide. No endorsement implied. 

This image is a work of the Forest Service of the United States Department of Agriculture. As a work of the U.S. federal government, the image is in the public domain. No endorsement implied. 

Photo attributed to US EPA. As works of the U.S. federal government, all EPA images are in the public domain. No endorsement implied. 

Photo attributed to Rob Friesel. [Screenshot from report]

Photo attributed to Angela Burgess, USFWS. This file is licensed under the Creative Commons Attribution 2.0 Generic license. No endorsement by licensor implied.