In certain parts of its range, the Guayaquil dwarf frog aestivates (the opposite of hibernate) during the dry season. It rolls up into a ball and enters into a state of torpor. All of its physiological functions (breathing, heartbeat, etc.) slow down, so much that it appears to be dead. In reality, however, the frog is only waiting for the end of the dry season. When the rainy season starts, it comes back to life.