Black-capped Chickadee with a caterpillar snack at Nisqually National Wildlife Refuge in Washington. Photo taken along the Twin Barns Loop Trail.

Female Rufous Hummingbird in nest at Nisqually National Wildlife Refuge in Washington. Photo taken along the Twin Barns Loop Trail.

Common Muskrat at Nisqually National Wildlife Refuge in Washington. Photo taken along the Twin Barns Loop Trail.