A young gull's mottled brown plumage acts as a 'not a threat' signal to territorial adults
Young herring gulls wear their mottled brown feathers like a diplomatic uniform, sending a clear biological message to aggressive adults that they are not rivals for territory or mates. This phenomeno
Phys.org — 4 July 2026
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Young herring gulls wear their mottled brown feathers like a diplomatic uniform, sending a clear biological message to aggressive adults that they are
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