During January, 1935, forty large owl pellets were collected from the roosting site of a colony of approximately eighty short-eared owls, located along the northwestern marshy edge of White Rock Lake, near Dallas, Texas. The owls had occupied the area for a period of nearly two months during their migration. Each of the forty pellets collected was broken up by washing, the bones removed, placed in numbered boxes and sent to the Division of Wild Life Research, U.S. Bureau of Biological Survey, for analysis.
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"Additional Data On Feeding Habits Of The Short-Eared Owl,"
Field and Laboratory: Vol. 4
Available at: https://scholar.smu.edu/fieldandlab/vol4/iss1/3