Researchers have discovered that the toucan can heat and cool its bill at an astonishing rate, changing its temperature by up to 10 Celsius degrees (18 Fahrenheit degrees) within a few minutes.
“Bird bills are not ‘dead tissues’ incapable of playing a role in heat balance, but are active contributors to thermoregulation,” biologist Glenn Tattersall of Brock University in Canada wrote in an e-mail. “Birds do not sweat, so must cope with other mechanisms to deal with elevated temperatures.”
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