BIO 2135 Quiz: Birds Keywords
21 Oct 2015
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Air sacs: an air-filled space in the body of a bird that forms a connection between the lungs and bone cavities and aids in breathing and temperature regulation. Barb: one of the parallel filaments projecting from the main shaft of a feather. Barbules: one of the small projections fringing the edges of the barbs of feathers. Beak: the horny, projecting structure forming the mandibles of a bird, especially one that is strong, sharp, and useful in striking and tearing; a bill. Bristle feather: bristles are specialized feathers that are believed to perform a tactile function. They have a stiff, tapered rachis and few, if any barbs that appear only at the base of the feather. Bristles are usually found on the head or neck, often around the mouth or eyelids. Contour feathers: any of the outermost feathers of a bird, forming the visible body contour and plumage.
