Document Type
Article
Publication Date
1969
Abstract
Purpose: To obtain, by random sampling, an index of abundance of breeding birds. Such a technique is needed in order to provide information on distribution and relative abundance of North American birds, and specifically to measure changes in abundance that result from such factors as changes in land use and widespread applications of pesticides.
Recommended Citation
Migratory Bird Populations Station, Division of Wildlife Research, "Cooperative Breeding Bird Survey of North America, 1969" (1969). Research. 23.
https://digitalcommons.pittstate.edu/sperryresearch/23
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