Why is it said that the hearing range of animals varies greatly?

            As a matter of fact, no two species of animals look alike, or behave alike. Similarly, the abilities and senses of animals vary too, from species to species.

            One cannot expect a monkey to have the hearing ability of an elephant, nor can auditory ability between a marine mammal and a terrestrial animal be compared. Generally, it is seen that larger animals hear and use low frequency sounds, while smaller ones have with higher frequencies.

            However, there are always exceptions, as in the case of spade foot toads that can easily pick up low-frequency sounds. These are animals that live in desert habitats and spend their days buried in ground during dry seasons. They come out only when pools are formed after infrequent rains. And that is when their young ones are developed, before the water dries up.

            Similar to animals, birds and insects too have peculiar auditory features that help them adapt to surroundings.