'Clear Fork Reservoir: Endangered Species Nesting Area' photo (c) 2011, laffy4k - license: https://creativecommons.org/licenses/by/2.0/

May 22nd has been named The International Day for Biological Diversity by the United Nations. Started in 2006 by the U.S. Congress, Endangered Species Day is the third Friday of May.

You might be interested in The Best Resources For World Biodiversity Day (& Endangered Species Day).