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Dumetella carolinensis
http://www.fs.fed.us/database/feis/wildlife/bird/duca/
General biology and effects of fire on the gray catbird.
Gray Catbird (Dumetella carolinensis)
http://birds.cornell.edu/BOW/GRACAT/
Species account includes a sound file and an illustration of this bird.
Gray Catbird (Dumetella carolinensis)
http://www.nenature.com/graycatbird.htm
Photo, range maps, and links to fact sheets.