•WARBLERS: Very small to sparrow-sized birds with short, slender bills; usually yellow, olive or blue-gray. Most forage rapidly in foliage; some hawk for insects; a few walk on ground or skulk in vegetation; some bob or flick tail; a few fan tail.
•WATERTHRUSHES: Ground-dwelling warblers with short, slender bills. Usually walk or run on ground near water, bobbing tail.
•WAXWINGS: Crested birds clad in soft browns and grays, with yellow tips to tail feathers. Travel in flocks and have bounding flight. Feed on berries and at flowers; may hawk for insects.
WOODPECKERS: Mainly black and white birds with vertical posture and strong, chisel-like bills. Hitch up tree trunks; drum on wood; have bounding flight.
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•WRENS: Stocky, brown birds with large heads, slightly downcurved bills, and short tails. Often skulk in vegetation; hold tail over back.
• Although you do not need to know whether a bird is a songbird to identify the species, it is helpful to be familiar with this term used by birders. A black box in front of a group name indicates that its members are songbirds.
