Photo By/Credit
John Heil/USFWS
Media Usage Rights/License
Public Domain
Image
Clint Pogue, a biologist with the U.S. Fish and Wildlife Service identifies a flower of Viola adunca, or Western Dog Violet; early blue violet during a rainy day in April near Arcata, California. The violet serves as a food source for the caterpillars of the Oregon silverspot butterfly. Credit: John Heil/USFWS
Species