• bats are the only flying mammals
• there are over 1000 speices of bat
• bats are nocturnal
• bats see in the night using a special skill called echolocation
• Most bats feed on insects,while others feed on fish,fruit or even blood!
• There are 3 species of vampire bats which feed solely on blood
• Vampire bats have small and extremely sharp teeth which are capable of piercing an animal’s skin [humans included] without them even noticing
• Vampire bats can carry rabies , making thier bites potentially dangerous
• Some bats live by themselves while others live in caves with thousands of other bats
• bats can live over 20 years
• ptropus bats [also known as fruit bats or flying foxes] are the largest in the world

By the way, on the last fact , ptropus is spelled correctly !