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1 Digestive Organs.
2 Forms of Feet — a, incised palmate foot; b, k, lobe-foot; c, g, insessorial foot; d, runner's foot; e, scratcher's foot; f, totipalmate foot; h, palmate foot; i, passerine foot; j, m, scansorial or yoke foot; l, staff foot.
3 Forms of Head and Bill — a, flamingo; b, spoon bill; c, yellow-hammer; d, thrush; e, hawk; f, pelican; g, avocet; h, sawbill; i, scissor-bill; j, dove; k, shoe-bill; l, gap bill; m, arassari; n, ibis; o, song-bird; p. stork.
4 Feathers of a Bird — a, frontal; b, crown; c, occipital; d, bill; e, cheek; f, breast; g, abdominal; h, rump; i, croup; j and k, sickle feathers; l, back; m, primary quills; n, secondary quills; o, coverts; p, pinions; q, shoulder-pinions.
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{{Information |Description={{en|Chart with drawings of various parts of the bird: digestive organs, examples of feet by function, examples of heads, feathers and placement.}} |Source=''The Encyclopedia Americana'', v. 3, 1920, facing p. 734. |Date=publ...