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Abstract

A unique situation of interest to ornithologists and students of animal behavior in particular occurs in the Jackson Hole area of Wyoming. There three congeneric species of sparrow breed in sympatry. Almost nowhere else can the Fox, Lincoln, and Song Sparrows be found occupying such closely related niches. The opportunity to continue observations on the behavior of the Song Sparrow and to collect similar data on the Fox and Lincoln Sparrows was the determining factor in our choice of Jackson Hole for our vocalization studies. There was also the possibility of obtaining data on interspecific behavior. Project Number 155.

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