The inventory was carried out by the Fédération des chasseurs de l’Oise to find out the location of the populations of coypu (Myocastor coypus), also known as the nutria and muskrat (Ondatra zibethicus) and to make an inventory of the damage caused. A survey sheet and a technical sheet for the recognition of the two species were provided to potential observers and all partners.
Species: Coypu (Myocastor Coypus), Muskrat (Ondatra Zibethicus)
Species characteristics: Mammals (other than large carnivores)
Type of actions: Management of habitats and wildlife
Leading partners: Fédération départementale des chasseurs de l?Oise