Grassland Birds of North America

This 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

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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

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General Information

• Introduction
• About the BBS
• Help Index

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Summary of Survey Results

Trends-Estimates of Change Over Time

• Breeding Population Trends

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

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Analysis and Interpretation:

Species Accounts

The Big Picture: Are Grassland Birds Declining?