Bats are birds. Just not our kind of bird.

Getting into technicalites and acting like a crackhead will get us no-where. lets keep this plain and simple.- All of the highly-learned translators who have always translated the word into bird from its original context must not have found a better suiting word. All that means is that one word could have branched off into two seperate, more specific words.Stop trying to tear down logic unless YOU have a better solution.