PLATTEEUW M (1989) Keepin up: Yellow-legged Gulls in the Netherlands: becoming more common. LIMOSA 62 (1): 49-50.

Yellow-legged Gull Larus michahellis recent years into categories of perception bird sightings reported by newspapers increasingly Yellow-legged Gulls. This suggests that these birds are increasingly in our country. Before this conclusion to be drawn, should problems about taxonomic status and recognition are are discussed. Until recently, the general tendency aile large yellow-legged gulls, except deKleine Gull, be regarded as subspecies the Gull. Since the late seventies one is increasingly likely the southern subspecies the Gull as a distinct species to consider: The Yellow-legged Gull Larus cachinnans. These are the subspecies atlantis (Canary Islands and Madeira), michahellis (Mediterranean) and cachinnans (Black and Caspian Sea) with barabensis (Central Asia) and mongolicus (East Asia). Recently identified that the northward expansion of michahellis and the southward extension of the British Herring gull (subspecies argenteus) on the Ile d'Oleran (France) both in the same colony Braeden zander hybrid ring.

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