North American Breeding Bird Survey, Annual Summary 1988.

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.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1989
Accession Number
ADA322693

Entities

People

  • Sam Droege

Organizations

  • United States Fish and Wildlife Service

Tags

DTIC Thesaurus Topics

  • Birds
  • Habitats
  • Wildlife

Fields of Study

  • Mathematics

Readers

  • Gender and Food Studies
  • Riverine Ecology
  • Systems Analysis and Design