Bank Swallow and Violet-green Swallow from Birds of America (1827) by John James Audubon, etched by William Home Lizars.… https://www.rawpixel.com/image/277403/free-illustration-image-swallow-audubon-birdFree Image from public domain license
Violet-green swallow (Tachycineta thalassina) by Jacob W. Frank. Original public domain image from Flickr https://www.rawpixel.com/image/4038597/photo-image-plant-bird-hummingbirdFree Image from public domain license