Guide to North American Birds

Around lake shores and tidal flats, especially in the wide-open spaces of the west, flocks of elegant American Avocets wade in the shallows. They often feed while leaning forward, with the tips of their bills in the water and slightly open, filtering tiny food items from just below the surface. Sometimes a flock will feed this way in unison, walking forward, swinging their heads rhythmically from side to side.

Everything about the Black-necked Stilt seems delicate -- from its incredibly thin stilt-legs to its slim wings and its needle-like bill -- yet it manages to thrive on the sun-baked flats around shallow lakes, some of them in searing climates.