SONG REPERTOIRES OF PUGET-SOUND WHITE-CROWNED SPARROWS ZONOTRICHIA-LEUCOPHRYS PUGETENSIS

Of 233 adult male White-crowned Sparrows Zonotrichia leucophrys pugete nsis recorded in British Columbia and Washington, 25 (10.7%) were foun d to have repertoires of two or three song types. This proportion is h igher than any reported previously for this species. Within repertoire s, most song type differences were minor, but some songs differed in t heme and dialect type. Individuals sang few renditions of one song typ e before switching to the other. We believe that the songs in an indiv idual's repertoire have the same meaning, and that multi-song repertoi res provide no selective advantage over a single song type in this spe cies.