Monitoring butterfly populations using the Fourth of July Butterfly Count.

  title={Monitoring butterfly populations using the Fourth of July Butterfly Count.},
  author={Ann B. Swengel},
  journal={American Midland Naturalist},
  • A. Swengel
  • Published 1 October 1990
  • Environmental Science
  • American Midland Naturalist
-The Xerces Society's Fourth of July Butterfly Count (4J), patterned after the popular Christmas Bird Count (CBC), is a nationwide, volunteer, annual 1-day census of butterflies and skippers at selected sites. The ornithological literature is reviewed, although not exhaustively, to summarize the methods for analyzing CBC data and to list the types of studies using these data. Applications of ornithologists' experiences with, concerns about, and uses for, CBC data to 4J studies are discussed, as… 

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