White throated Sparrow from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from…
https://www.rawpixel.com/image/277555/free-illustration-image-audubon-audubon-america-birds-public-domain-white-throated-sparrowFree Image from public domain license
87. The Red-throated Hummingbird, male and female (Trochilus colubris) 88. The Red-bellied Nuthatch (Sitta canadensis)…
Audubon's Warbler, Hermit Warbler and Black-throated gray Warbler from Birds of America (1827) by John James Audubon (1785 -…
https://www.rawpixel.com/image/277360/free-illustration-image-audubon-audubon-america-birds-public-domain-audubon-birdFree Image from public domain license
Yellow-throated Bunting illustration. Digitally enhanced from our own original edition of Pictorial Monograph of Birds…
Black-throated green Warbler, Blackburnian and Mourning Warbler from Birds of America (1827) by John James Audubon (1785 -…
https://www.rawpixel.com/image/277550/free-illustration-image-audubon-mourning-audubon-america-birds-public-domainFree Image from public domain license
121. The Carolina Tit (Patus carolinensis) 122. The Mourning Warbler (Trichas philadelphia) 123. The Yellow-throat (Trichas…
107. The Blue-grey Warbler (Sylvicola cærulea) 108.
https://www.rawpixel.com/image/329299/free-illustration-image-yellow-warbler-vintage-bird-public-domain-zoology-new-yorkFree Image from public domain license
Black-throated loon (Colymbus Arcticus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio…