Birds of America
By John James Audubon, F. R. SS. L. & E.
GENUS I--TROCHILUS, Linn. HUMMING-BIRD.
Bill long, subulate, depressed at the base, cylindrical, straight, or
slightly arched, flexible; upper mandible with the ridge narrow at the base,
convex in the rest of its extent, the sides sloping, the edges soft; lower
mandible with the angle extremely acute and elongated, the sides erect, the tip
acute. Nostrils linear, with a membranous flap above. Head small; neck short;
body moderately stout. Feet very short; middle toe scarcely longer than the
rest. Plumage rather blended and glossy above. Wings very long, extremely
narrow; tail rather long, broad, nearly even. The other characters as above.