Table 1. The biodiversity of wooded fragments in the Gascony hillsides

Ligneous plants Birds Syrphids (Dipterous)
Total species richness in all wooded areas 77 29 114
Species richness in a large wood (150 ha) 45 21 68
Total species richness in ten woodlots, having a total surface area of about 100 ha 60 22 74