The aim of this study was to evaluate the contribution of both natural and human-modified sites to butterfly species richness in Boussaâda region, the study was carried out in the semi-arid conditions, where no data were collected and available on butterflies in this area.
Two locations were selected which were visited every month from Mars 2015 to December 2016, a total of 07 species , belonging to 03 families were collected, the most abundant family was Pieridae 61 (70.9 %). By sites, it was noted that Vanessa cardui (33.96 %), was the most abundant species in the natural sites however, in the agricultural sites Pieris rapae ranked first with 54.55 %.
The abundance in the agricultural site was found to be lower than that in the natural site due to heavy human land modification, use, and disturbance. The results of Shannon-Weaver index showed that diversity was much greater in the natural site with the value of (H = 1,505) and 6 species were identified in the modified habitat, with the value of (H = 1, 08) having 4 identified species.
