These Toco toucan chicks are one week old. This image accompanied the research article "Heat Exchange from the Toucan Bill Reveals a Controllable Vascular Thermal Radiator," by G.J. Tattersall et ...
The toucan's bill is a vascularized structure that can also act as a radiator of heat. As revealed from thermal imaging, toucans can restrict blood flow to the bill when cold, and when warm ...
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