Golden-winged Woodpecker from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277240/free-illustration-image-audubon-colaptes-auratus-birdsFree Image from public domain license Plate 52: Red-bellied Woodpecker, Red-headed Woodpecker, Northern Flicker by Louis Agassiz Fuertes https://www.rawpixel.com/image/8905429/image-watercolor-art-vintageFree Image from public domain licenseYellow-shafted Flicker 1, U, Breast feather, black and white Washington DC https://www.rawpixel.com/image/8755687/photo-image-public-domain-birds-animalsFree Image from public domain license