In its judgment of 8 July 1987, Commission/Belgium, case 247/85, ECR 1987, p.3029, the Court noted at paragraph 6: «The Directive is based on the consideration that effective bird protection is typically a transfrontier environment problem entailing common responsibilities for the Member States (third recital in the preamble).». In this context, the preamble to the Directive notes that "effective bird protection is typically a trans-frontier environment problem entailing common responsibilities."