Technical notes:
(1) This is the first release of the 1966 - 2006 analysis, and we ask for public comments. Because this analysis
is a new product, we suggest that you carefully review results before use, and report possible problems to us.
(2) Starting this year, Bird Conservation Regions (BCRs) are going to be used as the primary physiographic strata for the analysis.
BCRs were developed to provide a coherent spatial framework for conservation planning efforts
under the North American Bird Conservation Initiative (NABCI)
. These regions were derived from existing physiographic strata (see map and explanation at the Bird Studies Canada
BCR site.
Please review the Comparative Analysis Section , in which we provide results
from the historic BBS strata analysis, the 1966-2006 BCR analysis, and the 1966 - 2005 BCR analysis.
(3) There are probably a few species naming issues that lead to empty result pages. Please bring these to our attention,
and we will correct them.
(4) Some species are grouped for analysis. These are indicated on the selection lists. Note that, in this review version of the program, we also provide analysis of certain ungrouped taxa as well.
General Information
Survey Results
Group Analysis:
Summary information on population change by region and time period
Species Analysis:
This program allows you to display BCR-level trends for
3 time intervals, by species.
Indices are provided as links from the species names
Region Analysis:
This program allows you to display trends for
3 time intervals, by BCR.
Indices are provided as links from the region names
Comparative Period and Dataset Analysis:
This program allows you to display state and survey-wide trends for
3 different analyses (1966-2006 analysis with BBS strata, 1966-2006 analysis with BCR strata, and 1966-2005 analysis with BCR strata).
This allows you to see the differences among analyses
|
