A handsome chickadee that matches the rich brown bark of the coastal trees it lives among, the Chestnut-backed Chickadee is the species to look for up and down the West Coast and in the Pacific Northwest. Active, sociable, and noisy as any chickadee, you’ll find these birds at the heart of foraging flocks moving through tall conifers with titmice, nuthatches, and sometimes other chickadee species. https://www.allaboutbirds.org/guide/Chestnut-backed_Chickadee