The mowing meadows reprensent over 50% of the site's surface. The caracteristic mesophile meadows, becoming rare nowadays since they are turned over to crops (maize notably) in Western France; and the meadows said humid, often close to water streams and sometimes floodable are separated.
Theses milieux host a whole flora (houlque, buttercup, daisies, clover) and a specifique fauna of invertebrates such as butterflies, bugs, grasshoppers, locusts, pollinators (bees, bumblebees) and their predators (birds and spiders).
On the hillock 14 species of grasshoppers and locusts, 80 species of bugs, 33 species of butterflies, 130 species of moths or 145 species of spidres were counted.