Common vampire bats
When you hear the name Vampire Bat, what was the first image that came to mind? Is it a terrible monster that feeds on blood, or a cute furry "flying puppy" that takes care of its companions?
Long-tongued bats
If you choose the former, then you will most likely be surprised by the following. In Central and South America, there are three species of completely blood-fed bats that move while their prey is asleep, tearing apart the skin of their prey with special teeth and secreting an anti-corrosive, anti-blood-clotting saliva that prevents the prey's blood from coagulating during feeding.
Nattrell bats
This predatory behavior makes vampire bats infamous, but they are actually creatures with excellent social skills. In general, these vampire bats will gather in hundreds of territories, and there is a strong social connection between bats living in the same territory. Female bats clean their bodies for their companions and even share their food with other bats.
Rat-eared bats
If a bat goes out the night before to forage for nothing, its neighbors will share their food with their unfortunate partner the next day. One day in the future, when the warm-hearted neighbor is unlucky and starving, this bat will in turn help the warm-hearted neighbor get through the difficulties.
Malay bats
This reciprocal behavior allows unrelated bats to share resources, increasing their probability of survival. This trait is very rare throughout nature, which also makes vampire bats a unique class of animals that behave altruistically.