The wings of bats evolved from forelimbs in the process of evolution, and are composed of skin (wing membrane) connected between their slender claws; A bat's snout is like a rodent or a fox. The external ear protrudes forward, which is large and flexible.
Bats have short necks, broad chests and shoulders, well-developed breasts, and slender hips and legs. In addition to the wing membrane, bats are covered with hair, with different shades of gray, tan, brown or black on the back, while the ventral color is lighter.
Most bats also have a keen auditory orientation (or echolocation) system, which can emit ultrasonic waves through the throat and then identify the direction according to the ultrasonic response.
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The main natural enemies of cave bats are snakes, lizards and so on; Natural enemies of arboreal (some fruit bats) and some raptors and cats. Other natural enemies of bats are human beings. For example, the big bat in Guam was extinct because of the predation of local people.
Bats have a wide range of food habits. Some species like nectar and fruit, others like to eat fish, frogs and insects, suck animal blood and even eat other bats. Generally speaking, big bats generally feed on fruits or nectar, while most small bats mainly prey on insects.
There are all kinds of bats that eat anything: including fruits, fish, pollen and even blood. Most bats prey on insects when flying at night, and each bat can distinguish its own sound waves, which shows that even if it preys with other bats, it will not be disturbed by other sound waves.
Bats generally have the habit of hibernating. Most of the hibernating places are in caves. During hibernation, their metabolic ability is reduced, their breathing and heartbeat are only a few times per minute, their blood flow slows down, and their body temperature drops to be consistent with the ambient temperature, but their hibernation is not deep. Sometimes they will excrete and eat during hibernation.
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