Breeding Bird Survey, 1966 [with List of References] PDF Download
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![Breeding Bird Survey, 1966 [with List of References] PDF](https://books.google.com/books/content/images/frontcover/S_sbzQEACAAJ?fife=w150-h200)
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Category : Bird surveys
Languages : en
Pages : 43
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![Breeding Bird Survey, 1966 [with List of References] PDF](https://books.google.com/books/content/images/frontcover/S_sbzQEACAAJ?fife=w80-h100)
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ISBN:
Category : Bird surveys
Languages : en
Pages : 43
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Author: Chandler S. Robbins
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ISBN:
Category : Bird populations
Languages : en
Pages : 52
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Routes are selected at random on the basis of one-degree blocks of latitude and longitude. Each 24.5 mile route, with 3 minute stopes spaced one-half mile apart, is driven by automobile. All birds heard or seen at the stops are recorded on special forms and the data are then transferred to machine punch cards.
Author:
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Category : Bird populations
Languages : en
Pages :
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![Breeding Bird Survey, 1967 and 1968 [with List of References] PDF](https://books.google.com/books/content/images/frontcover/IWYOzQEACAAJ?fife=w80-h100)
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ISBN:
Category : Bird surveys
Languages : en
Pages : 107
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Author: United States. Superintendent of Documents
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Category : Government publications
Languages : en
Pages : 1214
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Author:
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ISBN:
Category : Fishes
Languages : en
Pages : 888
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Author:
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ISBN:
Category : Bird populations
Languages : en
Pages : 32
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![Breeding Bird Survey, 1966 [with List of References] PDF](https://books.google.com/books/content/images/frontcover/OJ2UnQAACAAJ?fife=w80-h100)
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ISBN:
Category : Bird surveys
Languages : en
Pages : 43
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Author: William H. Goudy
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Category : Bird banding
Languages : en
Pages : 1194
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Singing-ground surveys of the American woodcock indicate that breeding populations have increased gradually over the past 7 years while production, as indicated by wing-collection surveys, has remained relatively stable. The woodcock harvest, meanwhile, has probably more than doubled during the past decade. This suggests that while woodcock are probably becoming more important to North American sportsmen, hunting mortality is still relatively unimportant.
Author: Sam Droege
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ISBN:
Category : Bird populations
Languages : en
Pages : 32
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