142The Commission is therefore correct in claiming, first, that SPA classification cannot be the result of an isolated study of the ornithological value of each of the areas in question but must be carried out in the light of the natural boundaries of the wetland ecosystem and, second, that the ornithological criteria which form the foundation of the classification must have a scientific basis. The use of flawed, allegedly ornithological criteria might lead to an incorrect demarcation of the boundaries of SPAs.