Why are bats’ eyes invisible in the morning but visible at night?

Bats do not rely on their eyes to determine direction.

Bats are nocturnal animals, so they only come out at night. Bats use sound waves to determine whether there are obstacles ahead and use this to change their flight path. Bats have good eyesight. Different species of bats have different eyesight. The use of ultrasonic waves by bats is not necessarily related to their eyesight.

The bats of the suborder Macrobatus have good vision and large eyes, and mainly rely on vision to identify objects; members of the suborder Microbats usually have degraded vision, small eyes, and mainly rely on echo to identify objects, and some types of facial evolution Special structures are developed to increase sonar reception, such as nose lobes, multiple wrinkles on the face and complex large ears.

Extended information

Characteristics of bats

Nocturnal, usually in groups, numbering up to one million. Some species in temperate areas have symptoms before winter. Migration behavior, mainly inhabiting caves, tree holes, and forests, breeding once a year, gestation is about 2-6 months, and giving birth to one child at a time. Many bats found in tropical and subtropical regions feed on the fruits of plants, and their appetites are large.

About 70% of bats prey on insects. They usually emit ultrasonic waves to explore their prey and mostly hunt in the air. Bats are very agile in hunting prey. Through high-speed photography, it was discovered that some bats hunt directly with their mouths, some use their wings to intercept prey into their mouths, and some use their tail membranes to scoop bugs into their mouths like a spoon. There are many ways to hunt. Bats are very insectivorous and can eat about one-third of their own weight in insects every night.

There are very few carnivorous bats. There may be two species of false vampire bats that often prey on rodents, small birds, frogs and lizards [1]. Currently, little is known about their behavior, and it is not certain whether they It is actively hunting.

Baidu Encyclopedia—Bat