76. Plataléa (Spoonbill). Head partly bare, auricular orifice covered with plumes. Nostrils elongated and in a shallow depression.
Tarsus about length of femur, reticulate at back and generally in front. Bill straight, always with distinct nail at tip of upper mandible. Young covered with down, and able to run or swim in a few hours after hatching.
FAMILY ANATIDÆ
(Ducks, Geese, Swans, etc.)
Bill thick, broad, high at the base, covered with a thin membranous skin and ending in a nail-like horny tip; edges of the mandibles cut into thin parallel ridges, or toothed; wings moderate; legs placed not very far behind; feet, four-toed, palmated; hind toe free, placed high on the tarsus. Food, grass and aquatic weeds, worms, insects, molluscs, and small fish.
SUB-FAMILY ANSERINÆ
77. Anser (Geese). Bill nearly long as head, elevated and covered with cere or skin at base; conspicuous nail at tip; under mandible smaller than upper; nostrils lateral, near middle of bill; tail of sixteen feathers; legs under centre of body; hind toe free, articulated upon tarsus.