A little story in the New York Times about bats might be more promising than it seems. The word "attention" isn't even mentioned, but the story is about how bat brains might work to pay attention to some sounds while ignoring others. Briefly, they work as a team, with different members performing different functions. The team work might include responding to a sound, quieting down other sounds, and heightening the important sound. Attention is such a mystery and so important to language that we ought to make a note of every clue as to its workings.