Heuglin`s gull or Siberian gull (Larus heuglini) is a seabird in the genus Larus. It is closely related to the lesser black-backed gull (Larus fuscus) and is often classified as a subspecies of it. It has also been included within the herring gull (Larus argentatus). Birds in the eastern part of Heuglin`s gull`s range are often paler grey above......