why bats fiy only at night?

Answer 1

Bats have wide hairless wings that would dry out in the sun if they flew during the daytime. Some bats eat fruit, many bats eat insects and vampire bats in the tropics feed on the blood of animals. Bats are good at flying at night because they use sound rather than sight to navigate. This method of navigation is know as echolocation and it is similar in principle to the sonar that submarines use to navigate the ocean. Bats send pulses of sound through their mouths or noses, and these pulses echo back outlining the objects in the bats’ flight path. The ears of a bat are large and oddly constructed but they help it to determine where the echoes are coming from.

To search for insects a typical bat will sweep an area with sound, sending out 10 beats per second. When the echoes come back from the prey, such as a fly, the sound pulses increase to more than 25 per second. This gives the bat a better idea of where the fly is moving. As the bat hones in on its prey, it sends out more and more sound blips; as many as 200 per second.

This method of navigation is very efficient for the bats. They can eat 25% of their body weight in insects in 30 minutes. Some insects, like gnats are so small that they weigh almost nothing. So some bats may catch more than 1200 insects in an hour, or one insect every 3 seconds. Some bats are so good at echolocation that they can detect and avoid wires as thin as human hairs.

Answer 2

Dessication is NOT the reason they fly at night. Bats have adapted to the available prey, therefore leave the nesting area at dusk, and return at dawn. Typically, in the case of insectivorous bats, prey becomes more active at night (insects DO dessicate in the sun), therefore they hunt at night to increase the chances of hunting success. Echolocation is a further adaptation to their target prey, rather than the time of day/night.
Vampire bats would be more active at night as their target prey would be less active (ie sleeping) and therefore they have a greater chance of blood parasitism without detection of the host. Did you know that vampire bats also reciprocate? If one individual fails to feed, another individual will provide food, knowing that should the same fate befall them, the other will return the favour?
As a result of the foraging behaviours, bats must sleep during the day which would be why you rarely see them. Also, they would tend to favour denser understory where prey is found (unless flying between locations, or mass migration), so you would not chance upon seeing them that often.

Answer 3

Bats have hairless wings and very sensitive eyes as compared to human beings. They emit high pitched sounds like sonar (sound navigation and ranging). These waves can send back echoes more efficiently during nightime. The hairless wings they have are effected by the infrared rays of sun during day.

Answer 4

Except for fruit bats, generally the food for bats is awake only at night. Also they could be attacked by birds of prey if they flew during the daytime.

Answer 5

Bats can also fly during day time, but since they are nocturnal they don't

Answer 6

1.They or nocternal animals .
2. Their eating habits and their food is available only at night.
3. they use ultrasound or sonar sound particle to navigate in morning due to noise pollution they can't navigate right thats why they are fly only at night

Answer 7

They are nocturnal. They sleep at day and hunt for food at night. This is because their food is found during nighttime.

Answer 8

They are nocturnal animals where they can see only at nights and can fly only at nights

Answer 9

Bats have wide hairless wings that would dry out in the sun if they flew during the daytime.

Answer 10

Since their food source are flying insects, I would think that flying insects are more active at night.