Hybridisation in gulls occurs quite frequently, although to varying degrees depending on the species involved. == Hybrid large white-headed gulls == European herring gulls and lesser black-backed gulls interbreed to a limited degree in their wide area of range overlap, producing birds of intermediate appearance, which can be confused with yellow-legged gull.
Hybridisation in gulls occurs quite frequently, although to varying degrees depending on the species involved. == Hybrid large white-headed gulls == European herring gulls and lesser black-backed gulls interbreed to a limited degree in their wide area of range overlap, producing birds of intermediate appearance, which can be confused with yellow-legged gull.
Source: Wikipedia "Hybridisation in gulls" · CC BY-SA 4.0
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