Hybridisation in Gulls - Hybrid Large White-headed Gulls

Hybrid Large White-headed Gulls

  • Herring Gull and Lesser Black-backed Gull interbreed to a limited degree where their ranges overlap, producing birds of intermediate appearance, which could be confused with Yellow-legged Gulls.
  • Western Gull and Glaucous-winged Gull hybridise extensively in western North America. Evidence of genetic influence of each upon the other is found throughout the range of both species.
  • Herring Gull and Glaucous Gull hybridise to a limited extent in Greenland and Iceland. The offspring have been termed "Nelson's Gull", but are sometimes also known as "Viking Gull".

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