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en.wikipedia.org/wiki/Animal_echolocation

Echolocation, also called bio sonar, is the biological sonar used by several kinds of animals. Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. .... Their use of echolocation allows them to occupy a niche where there are often many insects ...

en.wikipedia.org/wiki/Bat

Bats are mammals of the order Chiroptera whose forelimbs form webbed wings, making them .... Microbats use echolocation, but megabats do not, with the exception of the genus Rousettus. ..... brown bat (Myotis lucifugus), may catch an insect in mid-air with its mouth, and eat it in the air or use their tail membranes or wings ...

simple.wikipedia.org/wiki/Bat

Microbats mostly use echo-location and catch insects, but just a few eat fish or drink blood. Megabats do not echolocate, but instead eat fruit or nectar. ... though they can see with their eyes, they also use their ears to help them 'see' in the dark .

www.answers.com/Q/How_do_bats_use_their_ears_to_help_them_catch_insects

When they cannot see insects, at night, they can still locate them by emitting a sound and listening for echoes coming off the insects, a process called ...

www.scientificamerican.com/article/how-do-bats-echolocate-an

This leaf-nosed bat uses sound waves and echoes--a technique called echolocation ... Most bats produce echolocation sounds by contracting their larynx (voice box). ... At this point, the ear is ready to receive the echo of an insect one meter away ... The large variation in sizes, shapes, folds and wrinkles are thought to aid in ...

www.kidzone.ws/animals/bats/facts8.htm

Also notice the very large ears. Bat Senses. Bats smell, hear, taste, feel and see just like people do. ... Instead of relying on their sense of sight for night-time vision, bats make ... some bats who eat while flying (they swoop and catch insects -- eating them ... Scientists think that the nose leaves help the bats send the sounds in ...

animals.howstuffworks.com/mammals/bat2.htm

Bats and Echolocation - Echolocation is the system bats use to navigate in the dark when hunting ... The oversized ears help the bat accurately pinpoint its prey. ... This is crucial to a bat's survival, as their main prey are small, quick-moving insects. ... To help them find their prey in the dark, most bat species have developed a ...

wildliferemovalusa.com/batecho.html

Bats then gather these reflecting sounds using their ears, which helps them to ... small insects, they need their senses well-sharpened in order to be able to catch  ...

www.bats.org.uk/pages/bat_behaviour.html

Need help with a bat? ... All bats have very big appetites, because flying uses up lots of energy. ... How do bats catch their prey in the dark? Bats are not blind, but at night their ears are more important than their eyes. ... about anything that is ahead of them, including the size and shape of an insect and which way it is going.