PerrouPerrou is a commune in the Orne department in north-western France.WWW perrou.frGeographyPerrou along with the communes of Champsecret, Les Monts d'Andaine, Juvigny Val d'Andaine, Dompierre and Domfront en Poiraie shares part of the Bassin de l'Andainette a Natura 2000 conservation site. The site measures 617 hectares and is home to creatures such as the Bullhead, Brook lamprey and white-clawed crayfish.