87It should be noted at the outset, first, that according to Article 1 the Directive seeks the conservation of all species of birds naturally occurring in the wild state in the European territory of the Member States and covers the protection, management and control of these species and, second, that effective bird protection is typically a transfrontier environment problem entailing common responsibilities for the Member States (see, to this effect, Case 247/85 Commission v Belgium [1987] ECR 3029, paragraph 6).
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