Long-Term Changes in Songs and Song Dialect Boundaries of Puget Sound White-Crowned Sparrows

@inproceedings{Chilton1996LongTermCI,
  title={Long-Term Changes in Songs and Song Dialect Boundaries of Puget Sound White-Crowned Sparrows},
  author={G. R. Chilton and M. Ross Lein},
  year={1996}
}
Few studies have examined song variation in populations of birds over sufficiently long periods of time to demonstrate changes in the geographic distribution of song types. Baptista (1977) recorded songs of Puget Sound White-crowned Sparrows (Zonotrichia leucophrys pugetensis) over much of their range in 1970 and 1977, describing six song dialects on the basis of differences in the terminal trills of songs. We documented the distribution of song dialects in the northern part of the range of… CONTINUE READING

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