Indigo Bird from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of…
https://www.rawpixel.com/image/277398/free-illustration-image-audubon-audubon-america-birds-public-domain-audubon-birdFree Image from public domain license
Plate 74: Blue Grosbeak, Indigo Bunting, Dickcissel, House Sparrow by Allan Brooks