lilsavagekid544
lilsavagekid544 lilsavagekid544
  • 22-02-2017
  • Biology
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why do the blood vessels in the toucans bill shrink?

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18smithj
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 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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