Skeletons of eight species of bird including a pigeon hawk (merlin), a barn owl, a woodpecker, a maccaw and an ostrich (?) Line engraving, 1830/1870?.

Licence: Public Domain Mark

Credit: Skeletons of eight species of bird including a pigeon hawk (merlin), a barn owl, a woodpecker, a maccaw and an ostrich (?) Line engraving, 1830/1870?. Wellcome Collection. Source: Wellcome Collection.