How to Collect Data

Annual Monitoring

Annual monitoring has been going on for a long time through the Christmas Bird Count and Breed Bird Survey. All observers collect data using the same protocols. The exact day is not important, as is a defined period of time to collect data, for example, one week before or after Christmas. The location and data collection protocols and forms allow people throughout the country to collect data at a national scale.

Multiple year data are important to look at population changes and to track species that are "irruptive" (i.e., disappear for a few years at a time then reappear).

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