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California red-legged frog, Mount Diablo State Park, California 2016
Chuck Peterson, Flickr/Creative Commons
Young Chinook salmon
Zureks/Wikimedia Commons
Crotch’s bumble bee
The Xerces Society/Stephanie McKnight
Hine’s emerald dragonfly, Paul Burton/USFWS
Indiana bats in a cave
Andrew King/USFWS
Monarch caterpillar feeding on milkweed
Cam Miller, Flickr/Creative Commons
Northern spotted owl with a mouse
US Bureau of Land Management
Pink mucket pearly mussel museum specimens
Tom Schirtz, McClung Museum, University of Tennessee
San Joaquin kit fox, young kits
USFWS
Streaked horned lark
Rod Gilbert