Science
A toucan's enormous beak doubles as an air conditioner
HERE’S THE INTERESTING PART
When you live in entirely sweltering jungles, your oversized facial accessory better have a secondary function. Because birds completely lack sweat glands, this massive, deeply vascularized appendage acts directly as a highly efficient thermal radiator. By forcefully directing hot blood into the surface tissues of the beak, they aggressively dump massive amounts of excess heat straight into the air.
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