The North American Breeding Bird Survey-Grassland birds

This Home Page provides a summary of population trends and breeding distributions of grassland birds in North America, as documented by the North American Breeding Bird Survey (BBS). Wintering species distributions are summarized from Audubon Christmas Bird Count (CBC) for species that winter in North America.

Version 95.0 - 11 October 1995

Please cite this Page as:

Sauer, J. R., B. G. Peterjohn, S. Schwartz, and J. E. Hines. 1995. The Grassland Bird Home Page. Version 95.0. Patuxent Wildlife Research Center, Laurel, MD

General Information

Introduction
About the BBS
Help Index

Summary of Survey Results

trend info Trends-Estimates of Change Over Time

Breeding Population Trends

graphs Graphs of Annual Indices

Annual Indices-Breeding Season
Comparison of BBS and CBC Results

Maps of Relative Abundance

Breeding Abundance Maps-BBS Results
Winter Abundance Maps-CBC Results

Maps of Bird Population Change

Breeding Season Trend Maps

Analysis and Interpretation:

Species Accounts

The Big Picture: Are Grassland Birds Declining?