| Dedicated to Chandler S. Robbins, originator of the survey, to honor his 50 years of government service |
Most Recent Update: 29 July 1997.
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Summary information on population change by region and time period
This page allows you to display trends for
3 time intervals, by species.
These are relative abundance maps, estimated
over the interval 1982-1996.
These are maps of population change, based on the 1966-1996 interval.
These maps are based on BBS data from Alaska.
These lists provide mean abundances
for all species encountered on the BBS in a state/province,
summarized by physiographic region.