Breeding Bird Surveys monitor the status and trends of North American bird populations. Following a rigorous protocol, BBS data are collected by thousands of dedicated participants along thousands of randomly established roadside routes throughout the continent. Professional BBS coordinators and data managers work closely with researchers and statisticians to compile and deliver these population data and population trend analyses on more than 400 bird species, for use by conservation managers, scientists, and the general public.

Participants in a BBS run specific routes from their vehicle. They typically start early in the mourning during the nesting season. The participant drives .5 mile, stops, looks and listens for 3 minutes, recording the birds seen and heard. There are 50 stops in a route.

A vast amount of data has been acquired over the years and is available to researchers and the public.

Researchers using BBS data studied the populations of several grassland birds. They found that Grasshopper and Baird’s Sparrows were especially vulnerable to hot, dry conditions. perhaps indicating their populations could fall from further climate change.

Learn more at the North American Breeding Bird Survey web site.  

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