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University campuses often contain contiguous areas of urban green space (UGS) which are otherwise scarce in large cities and, thus, may provide critical habitat for numerous species. In this study, we evaluate butterfly and plant diversity at Chiba University in Japan from five UGS types, including intensive green roofs, meadows, roadsides, open spaces, and community gardens. Surveying non-destructively every two weeks from June to November 2010, we identified 707 individual butterflies to 25 species from five families, including red-listed species (e.g. Parantica sita Kollar, 1844). However, one species, Pseudozizeeria maha Kollar, 1848, represented over 50% of all individuals surveyed. Butterflies in the family Papilionidae showed strong preference for roadside habitat, indicating the importance of ‘butterfly flyways’ and contiguous habitat corridors on University campuses. Butterfly richness and abundance …