Chesnut-backed Titmouse, Black-capt Titmouse and Chesnut-crowned Titmouse from Birds of America (1827) by John James…
https://www.rawpixel.com/image/277312/free-illustration-image-audubon-titmouse-audubon-america-birds-public-domainFree Image from public domain license
Black-capped chickadee (Parus atricapillus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929…