the chimney swift is a medium-sized member of the swift family primarily found in the southeastern united states + northern south america. at one point, these birds used hollow trees to nest; today, they are almost entirely found using man-made structures, primarily chimneys, which is how they get their name. like other swifts, they are unable to perch, but can vertically cling to surfaces. if groups of chimney swifts are disturbed, they may loudly clap their wings in an attempt to scare off predators. these birds live much of their lives in the air, and only feed on insects and arthropods caught in flight.
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