Post #2104441
2026-05-05 19:24 UTC
I have just had a look at the original research on gulls and their eggs, Niko Tinbergen's 1953 study The Herring Gull's World. He found that giving the gulls a choice between Yellow and natural, Blue and natural or Red and natural coloured eggs, they didn't show preference except for Red or Natural - then they favoured the natural coloured eggs
Replies (1)
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@sarahdalgulls@ecoevo.social 2026-05-05 19:27
also: "Influence of size... the giant egg was chosen 6 times whereas the normal [sized] egg was never taken. All birds which were given the large egg became very excited and made frantic attempts to cover it"