Re-introducing native species

Article 21(2) of the Convention on the Conservation of European Wildlife and Natural Habitats (Bern 1979) requires each that contracting party undertakes to encourage the reintroduction of native species of wild flora and fauna when this would contribute to the conservation of an endangered species, provided that a study is first made in the light of the experiences of other Contracting Parties to establish that such reintroduction would be effective and acceptable.