ABNC Links-cbc

Athol Bird and Nature Club

Links: CBC

National Audubon Society's Christmas Bird Counts (CBC)
(Much of the explanatory information on this page was copied on 2000-11-20 from http://birdsource.tc.cornell.edu/cbcdata/explain.htm )

Athol Circle CBC Information
10-Year CBC Records - Athol Circle
99th CBC - Athol Circle
100th CBC - Athol Circle
101st CBC - Athol Circle
CBC General Information

CBC Species Records for the Athol, MA Circle
The Athol, MA Circle (Circle ID = MAAT) submitted its first CBC data for Christmas 1967. Thus the results for this count are found under CBC 68. Two other Athol counts were done in earlier years, but the results were not submitted to the powers that be. (Someday I will add these results to this site under Counts 66 and 67 - Susan) Therefore, for example, CBC 68 is referred to locally as the 3rd Annual Athol CBC and CBC 100 is referred to locally as the 35th Annual Athol CBC.

Ten-Year Count Day + Count Week Species Records for the Athol, MA Circle
These summary reports for Athol were generated from the CBC Online Database.

Species Counts for Athol, Massachusetts (MAAT) for Counts 66-75
Species Counts for Athol, Massachusetts (MAAT) for Counts 76-85
Species Counts for Athol, Massachusetts (MAAT) for Counts 86-95
Species Counts for Athol, Massachusetts (MAAT) for Counts 96-100

You may go to the CBC Online Database to generate your own preferred Species Record reports for any 5-, 10-, or 15-year period for any of the Circles in the United States and Canada.

99th CBC - Athol Circle
CBC Results of the 99th Count page to generate reports of the 99th Count by any Circle, or by any Species.

100th CBC - Athol Circle
CBC Results of the 100th Count page to generate reports of the 100th Count by any Circle, or by any Species.

101st CBC - Athol Circle
101st CBC - Athol Circle- Dave's initial trip report
101st CBC - Athol Circle - Dave's updated trip report
Athol Circle 101st CBC - Dave's Master List
2000 is The Year of the Junco
Athol Daily News article
CBC Results - 101st Count - Athol Circle
CBC Results - 101st Count- Dark-eyed (Slate-colored) Junco

You may go to the CBC Results of the 101st Count page to generate reports of the 101st Count by any Circle, or by any Species.

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What is the Christmas Bird Count ?
From humble beginnings nearly a century ago as a protest to the excessive slaughter of birds, the National Audubon Society's Christmas Bird Count (CBC) has become the world's largest all-volunteer bird survey. More than 45,000 people participate each year in this all-day census of early-winter bird populations. Participants do their counting within a designated 15-mile circle on a given count day. The results of their efforts are compiled into the longest running database in ornithology, representing close to one hundred years of unbroken data on trends of early-winter bird populations across the Americas. This CBC database is one of many interactive BirdSource web sites designed and managed by the National Audubon Society and the Cornel Lab of Ornithology.

What is the Status of the CBC Species Records in the Database ?
There are errors in the data. As an example, some counts have errors in the number of eagles reported, or in the breakdown into adult, immature, and unknown. Therefore, the data must not be used for scientific studies until it has been reviewed and corrected by CBC compilers. Procedures are being developed to accept corrections.

At present, the database is missing taxonomic information for some obsolete species names, hybrids, and 'generics' (ex. gull sp., buteo sp.). These could not be placed in the appropriate order in the list of species and instead appear in a separate table at the end of the listing.

What Type of Species Records are in the Database ?
Count Day Only: report shows the number of each species observed during the one-day count event.
Count Day + Count Week: the presence of additional species reported by Circles during the week of the count will be added to the report, with "cw" listed in place of the number observed.

What is the CBC Count Number ?
The annual CBC surveys and results are referred to by "Count Number". This is the number in sequence of a Christmas Bird Count. CBC 1 was taken during the period December 1900 - January 1901. CBC 99 was was taken during the period December 1998 - January 1999.