Bats and EcholocationBats are mammals whose forelimbs have developed as wings. This makes them the only mammal in the world that is capable of flight. There are about 1,100 species of bats around the world.Bats can be separated into two suborders: megabats and microbats. Not all megabats are larger than microbats. There are two major differences between the two kinds of bats. Microbats use echolocation to direct themselves. They also use this ability to find food. Megabats do not have this ability. Instead, they have a claw on their second toe and forelimb. Microbats do not have this claw.Megabats are known to eat fruit, nectar, and pollen. Microbats eat insects, blood from larger animals, small mammals, and fish. The echolocation used by microbats is a form of biological sonar. It is also used by dolphins and whales.Echolocation is a process by which animals emit calls out to the area around them. They listen to the echoes that return from various objects in the area. They use these echoes to locate, range, and identify objects. Ranging is done by measuring the time delay between the animal's vocals and the echo's return. Microbats use their ears to perform this task.In 1794, a scientist conducted a series of experiments on bats. He concluded that they navigated through their sense of hearing. But the scientific community rejected his findings. In 1938, another scientist described the ultrasound echolocation used by bats.Microbats use echolocation to navigate and forage in total darkness. They emerge from their caves or roosts as the sun sets. They forage for insects during the night. Their ability allows them to occupy a special niche. This is the time where there are often many insects. These insects come out at night since there are often fewer predators. There is much less competition for food at this time and fewer species that may prey on the bats themselves.According to the passage, all of the following are true about microbats EXCEPT …