During extreme heat and drought in deserts, they may burrow underground to escape the heat and preserve moisture.
Certain species of cicadas have long life cycles, spending several years underground before emerging in large numbers during the summer months to breed.
Some species of ground squirrels enter torpor during hot periods to conserve energy and water, though it’s not typical for them to hibernate in the summer.
These frogs dig deep into the ground during dry, hot periods, becoming dormant until conditions improve.
In response to drying ponds or drought, lungfish can burrow into the mud and estivate, a dormant state similar to hibernation.
Some species of snakes, like the western diamondback rattlesnake, may aestivate during extreme heat by seeking refuge in cooler, underground burrows.
Certain insects might enter diapause, a state of suspended development or reduced activity during unfavorable conditions. For example, some species of beetles or butterflies might aestivate during hot, dry periods.
Though uncommon, in regions where summer conditions are harsh, some bat species may enter a torpid state to conserve energy and water.