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Description: |
iv, 107 pages : maps ; 27 cm |
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Bibliography Note: |
Includes bibliographical references (pages 27-29). |
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Summary, Etc. Note: |
Abstract: In the Breeding Bird Survey of a large section of North America of North America, cooperators ran 982 survey routes in 1967 and 1,174 in 1968. All States except Hawaii and all Canadian Provinces except Newfoundland were included. |
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Abstract: 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 magnetic tape for analysis. |
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Abstract: A sophisticated analysis program, here employed for the first time, is used to compute weighted mean values of the survey results for selected species at the State, stratum, regional, and continental level. |
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Abstract: Maps show the breeding range and comparative abundance of selected species. |
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Additional Physical Forms: |
Online version: Robbins, Chandler S. Breeding bird survey, 1967 and 1968. Washington, D.C. : U.S. Dept. of the Interior, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife : For sale by the Supt. of Docs., U.S.G.P.O., [1969] (OCoLC)650013260 |