On Sept. 9, the National Audubon Society released the results of several years’ worth of studies that predict the future ranges of 588 North American bird species taking into account measurable levels of accelerated global warming (http://climate.audubon.org). The bird census data that was used in these studies came from citizen derived Christmas Bird Counts as well as Breeding Bird Surveys. Both of these bird survey methods have been frequently carried out in communities around our state and across North America. The weather data for the studies came from the National Weather Data Center and from leading climatologists.
Very briefly, distribution maps of the various bird species were generated and associated with existing climatic characteristics. Then, subtle predicted changes in precipitation, season onset, and temperature were added to the computerized models and new future bird distributions were predicted.