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What is Average Count?

"Average Count" is the average number of birds seen on checklists with a positive observation for the species within a specified date range and region. This calculation differs from "Abundance" in that it only incorporates checklists that reported the species (no zeros), essentially telling us how many of each species we can expect to see where the species encountered. For example, starting on the week of 15 Jan we might expect to see about 29 American Crows in areas where the species occurs. This large number indicates the winter flocking behavior of this species. In contrast, starting on the week of 15 May we might expect to see just 3 American Crows where the species occurs. This smaller number indicates the onset of the breeding season when the large flocks break up and disperse to each pairs' breeding location.
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