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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