Butterfly migration in the southeastern USA

Efforts to understand butterfly migration in the Southeast U.S.

Trapping data for Walker's 2001 Environmental Entomology paper
      numbers of 11 species trapped as they migrating through Gainesville during spring and/or fall, 1984-2000

Azimuth data for Walker and Littell's 1994 Ethology paper
      (and for Walker and Whitesell's paper in preparation)
      21,539 azimuths of butterflies during their fall migrations