
Dedicated to Chandler S. Robbins, originator of the survey.
Most Recent Update: 15 May 2008.
Summary information on population change by region and time period
This program allows you to display trends for
3 time intervals, by species.
Indices are provided as links from the species names
This program allows you to display trends for
3 time intervals, by region.
Indices are provided as links from the region names
Red-shaded Version
Blue-shaded Version
These are relative abundance maps, estimated over the interval 1994-2003.
These are maps of population change, based on the 1966-2003 interval.
This link takes you to the population change analysis results
for bird conservation regions.
This program allows you to estimate mean abundance from BBS
data for any species, at any location in the survey area. (This
now includes Alaska!)
This link transfers you to the Bird Identification InfoCenter,
in which is contained pictures, songs, and identification tips
of most North American Bird Species.