Alexandre Boissinot; Pierre Grillet; Aurélien Besnard and Olivier Lourdais. Amphibia-Reptilia, december 2015. We studied common frog occurrence and abundance in western central France ( Deux-Sèvresdepartment) close to the southern margin of lowland distribution. Our results pointed out that the proportion of woods surface around sampled areas (1 ha) was a critical determinant of common frog presence and abundance. Extensive farming, which maintains a mosaic of small woods, may provide a robust conservation tool for this species. Leer más.