Abstract
Abstract. The purpose of this data set was to investigate the effects of habitat characteristics and urbanization on grassland butterfly diversity. We sampled butterflies at 66 sites in Boulder County Open Space in the years 1999 and 2000. We tested for effects of habitat characteristics (grassland type and quality) and landscape context (percentage surrounding urbanization) on butterfly diversity and abundance. Although both habitat characteristics did affect butterfly diversity, landscape context did not. The data contain butterfly species diversity and individual species' abundance for the five periods sampled: July 1999, August 1999, June 2000, July 2000, and August 2000. Our samples included 58 species from five butterfly families: Hesperiidae (17 species), Papilionidae (4 species), Pieridae (7 species), Lycaenidae (11 species), and Nymphalidae (19 species). These data include endangered butterfly species, as well as surveys from relictual tallgrass prairie. There is some limitation to these data, as...
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