Estivation or aestivation (from Latin aestas, summer), also known as "summer sleep", is a state of animal dormancy somewhat similar to hibernation. It takes place during times of heat and dryness, the hot dry season, which is often but not inevitably the summer months.
they may not sleep for days.. but become diurnal... active early or laters to avoid the heat of the day.. but not sleep for days when its hot or dry...