lilsavagekid544 lilsavagekid544

22-02-2017
Biology

contestada

why do the blood vessels in the toucans bill shrink?

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18smithj 18smithj

22-02-2017

I'm not completely sure, but I think it has something to do with their beaks being sensitive to heat.

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lbutner02 lbutner02

22-02-2017

The toucans beak used to be for attracting potential mates and recent biologists say it is used to peel fruit or warn off other creatures. But the blood vessels shrink to control the blood flow rate.

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