Abstract
Tape recordings made in Texas reveal that neighboring black-crested titmice, Parus atricristatus, share a repertoire of several song types. When singing together, neighbors frequently sing the same song type, and, similarly, individuals often replied with the pattern played to them from a tape recorder. Thus the manner of singing of this species is similar to that of some other tits and certain richmondenine finches which often match patterns when singing.

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