I'm not sure that the AI significantly under-performed humans. It looks to me like the labels that the accuracy number came from were labeled by watching video

I'm not sure that the AI significantly under-performed humans. It looks to me like the labels that the accuracy number came from were labeled by watching video of the bats. The 61% understanding number was off of 7 possible topics and averaged over each topic so it's definitely better than guessing. I suspect there's a fair amount of ambiguity and mislabeling in these "topics" from humans trying to interpret bat motivations so 100% accuracy probably isn't really feasible. I have no idea what the state of the art is in bat understanding but the results seems really impressive to me - maybe I'm easily impressed? :)