Accession Number : ADA322693
Title : North American Breeding Bird Survey, Annual Summary 1988.
Descriptive Note : Biological rept.,
Corporate Author : FISH AND WILDLIFE SERVICE LAUREL MD OFFICE OF MIGRATORY BIRD MANAGEMENT
Personal Author(s) : Droege, Sam
PDF Url : ADA322693
Report Date : JUN 1989
Pagination or Media Count : 22
Abstract : Introduction The North American Breeding Bird Survey (BBS) is run by approximately 2,000 skilled amateur ornithologists. Beginning in 1966, BBS cooperators have been collecting standardized information on North American bird populations. The BBS is a roadside survey, comprised of permanent routes that arc surveyed yearly. In this report, we present the population changes of the 222 bird species reported on >50 BBS routes during 1987 and 1988. Population trends for 1966-87 are presented for comparison. We present maps illustrating patterns of population change for selected species, and summarize State and physiographic strata patterns of population change as the proportion of species that increased in each region.
Descriptors : *BIRDS, *NORTH AMERICA, *BREEDING, POPULATION, SURVEYS, PATTERNS, STANDARDIZATION, MAPS, ROUTING, SEDIMENTARY ROCK.
Subject Categories : Biology
Cartography and Aerial Photography
Distribution Statement : APPROVED FOR PUBLIC RELEASE