Air scoops on the sides of ants cool them through evaporation.

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"Another reason ants succeed so well is that they're superb lawn-traversing machines. When this first one backs away from the shadow of the giant human and reenters the main part of the sunny, hot lawn, little air-scoops on its side automatically switch on. A mist of cooling water vapor puffs upward from them. That keeps the ant's temperature down, but it could also mean that the ant's nitrogen--the equivalent of our urine substances--would become overconcentrated." (Bodanis 1992: 39)

Book
The Secret Garden: Dawn to Dusk in the Astonishing Hidden World of the GardenNovember 1, 1992
David Bodanis

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