What I mean is that the following are not the same:
1a. Bats can fly in the dark. PLUS
1b. Bats can feed in the dark.
2. Bats can fly and feed in the dark.
"fly and feed" go together to convey the meaning that bats can feed "on the fly" (sorry, I couldn't help it, "on the fly" isn't exactly appropriate here, but it sounds cool by using it literally in this case). Just like bread and butter, or a black and white dress. You don't have a black dress and a white dress, but a black and white dress. I guess that might be the reason why the OP asked this question. But, oh yes, I think I am digging too deep. There is probably no special term for describing this.