 During approach to a detected target, the duration of the sounds is gradually decreased, as is the energy of the sound.Echolocating bats occupy a diverse set of ecological conditions – they can be found living in environments as different as Europe and Madagascar, and hunting for food sources as different as insects, frogs, nectar, fruit, and blood.Additionally, the characteristics of an echolocation call are adapted to the particular environment, hunting behavior, and food source of the particular bat.