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:
Sunset reflected on open water with nesting box in foreground and far shore in background. Check categories October en br Image title Sunset reflected on open water with nesting box in foreground and far shore in background Image from Public domain images website publicdomainimage html publicdomainimage Jackson Elizabeth
Page 2017 Free-images.com. All images are Public Domain