The Faculties of Birds

adapted air-cells Aldrovand Anat animals appear bill birds of prey Blumenbach body bones Buffon bustard cage cardiac cavity chaffinch circumstance Cochlea Colonel Montagu Comp consequently contrivance cornea covered crow digastric muscle digestive discover distance ducks eagle experiments fact faculty feathers feed feet fish flight gannet gastric glands gizzard goose grain ground gullet habits hare Hist holes humerus insects instance instinct larvæ legs less mandible membrane migration Montbeillard motion mouth move muscles naturalists nature neck nerves nest never observed Oiseaux opened opinion organ Ornith ostrich owls papillæ pass passage pectorals peculiar pelican pigeon portion quadrupeds reason remark rendered rooks says seems seen sight similar singular Sir Everard Home skin smell species spring stomach structure substances surface swallows Temminck tion toes tongue torpid toucan tubes walk whole wings winter woodcock young