What do bats ?

"macska"さんは[url:kb:731]で書きました:

Hi, This is Banana.

I read your posting.
I am very interested in night-time ecosystem.
Please let me know what bats do for it.

Bye-bye

〉I like frogs and bats. Do you think they are weird? I think they are very important for our ecosystem.

〉A man who is researching bats will come to our place this evening. He says, "People tend to see the daytime ecosystem only. But the night-time ecosystem is important, too. They balance each other. Bats are living in the night-time ecosystem and they are important part of it."