Join the Christmas Bird Count

Thousands of volunteers across North America take part in the Christmas Bird Count every year to help assess the health of winter bird populations.

| December 2006/January 2007

  • Christmas bird count - woman with binoculars
    Join the winter bird watchers and help with the Christmas bird count.
    Photo by Richard Day/Daybreak Imagery
  • Christmas bird count - tufted titmouse
    Tufted Titmouse
    Richard Day/Daybreak Imagery

  • Christmas bird count - woman with binoculars
  • Christmas bird count - tufted titmouse

This winter, more than 50,000 volunteers across North America will work together to identify and count wild birds as part of the Christmas Bird Count. This annual event, coordinated by the National Audubon Society, combines the totals collected by local bird watchers to produce a yearly snapshot of winter bird populations.

The data is used by biologists to study variations in bird populations as well as the underlying environmental reasons behind those changes. While some bird species are declining, other populations are growing and expanding their ranges. For example, mourning doves are expanding their range north into the northern United States and Canada. One of several factors behind that change may be increasingly warm winter temperatures.

Geoff LeBaron, director of the Christmas Bird Count, says that last year more than 2,000 local field parties took part in the count. The count is a long tradition—it began more than 100 years ago—but LeBaron says it’s only been within the past 20 years that the scientific community has embraced it as a rich source of data and developed new methods for analyzing the records.

“It basically has become the best tool for looking at how birds are doing in the early winter period,” LeBaron says. “Since the methodology is standardized, we’re able to actually see what kind of trends there are with the birds we’re counting.”

LeBaron says that for many people, local bird watching is the catalyst that gets them involved with national conservation issues. Often, local forests or wetlands need to be protected, and for migratory birds, habitat has to be protected everywhere along their routes.

The Christmas Bird Count is conducted from Dec. 14 to Jan. 5 every winter, and is open to both amateur birdwatchers and trained ornithologists. Organized groups spend a day counting birds in assigned, 15-mile-diameter circles. Inexperienced observers are paired with veteran birders to help keep the count accurate.

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