The estival heat made it difficult to sleep at night.

I love to estivate during the summer.

During the hot summer months, some animals go into estivation to conserve energy.

The turtles are estivating in the sand.

The birds estivates during the hot summer months.

The turtles estivated during the dry season.

The estivations of the turtles help them survive in hot and dry climates.

The estivator burrowed into the ground to estivate during the dry season.

The estivators unloaded the cargo from the ship.