Are Egg Shells a Sun Screen for Birds?

World of Birds

Are Egg Shells a Sun Screen for Birds? Are Egg Shells a Sun Screen for Birds?

The eggshells of wild birds may act like “sunblock”, scientists have said.

A range of UK birds’ eggs showed adaptations in pigment concentration and thickness to allow the right amount of sun to reach the embryos inside.

Researchers examined 75 species’ eggs kept in a museum collection.

“Embryos do need UV exposure to develop – too little and they don’t develop enough… too much and it causes damage,” said team member Dr Steven Portugal from the University of London.

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