Like the wattles on chickens, the naked, protruding helmet of the helmeted guineafowl functions as a cooling system by enhancing convective heat loss. (discovermagazine.com)
A turkey - like bird with a vulture's head, the vulturine guineafowl makes its home in the dry grasslands of northeast Africa. (discovermagazine.com)
Luckily, guineafowl brain temperature can vary as much as 11.7 degrees Fahrenheit without apparent harm. (discovermagazine.com)