Urohidrosis (sometimes misspelled "uroh ydrosis") is the habit in some birds of defecation onto the scaly portions of the legs as a cooling mechanism, using evaporative cooling of the fluids. Birds' droppings consist of both feces and urine, which are excreted together through the cloaca.
...Because of its apparent functional similarity to true sweating, I suggest the term urohidrosis (Greek: ouron = urine; hidrÅs = sweat) for this phenomenon.
The term is also used to describe the analogous behaviour in Pinniped that cool themselves while basking by urinating on their hind flippers.
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