As you know, the Endangered Species Act is turning 40 this year.
As our gift to you, this week we present a glorious photo essay, highlighting some of the states and species we've featured on Open Spaces so far.
Protecting Our Waters: The mussels of Virginia's Clinch and Powell Rivers
(Photo: Gary Peeples/USFWS)
Delmarva Peninsula Fox Squirrel: Journey to Recovery
(Photo: Colorado Division of Wildlife)