Birds of Indian Subcontinent

Syllable Sharing among North American Populations of the Eurasian Tree Sparrow

Publication Type:Journal Article
Year of Publication:1987
Authors:Lang, AL, Barlow, JC
Journal:The Condor
Date Published:1987
ISBN Number:00105422
Keywords:Passer, Passer montanus, Passeridae, Salicipasser, Salicipasser montanus
Abstract:The nest advertisement and defense song of the Eurasian Tree Sparrow (Passer montanus) was examined for evidence of syllable sharing among populations. Twenty Eurasian Tree Sparrows were introduced into North America at St. Louis, Missouri in 1870 (Widmann 1889). The population subsequently expanded north and northeastward into Illinois and now numbers approximately 150,000 birds. Four populations were sampled, the closest site to St. Louis lying 85 km to the north. Jaccard's coefficient was used to assess the degree of syllable sharing among the populations sampled. Several syllables were found to be unique to one or two populations. A pattern of song similarity between populations was found that did not correspond to geographic distances between sample sites but may correspond to the direction of spread of the population.
Short Title:The Condor
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith