Robin frowns a little as well, at the repeat mention of a bird... Though, honestly, his frown could just as well be because he has paused elbow-deep in dirty bathwater and his subject is hiding their feet.

"It used to be a bird, in the old stories."

Maybe that's It. Maybe they're struggling with conflicting accounts. Robin remembers all of those tangled souls bumping around, knocking clumsily into each other.

"So both are right. Sometimes a bird, sometimes a bat."

He tilts his head. "You want to know what happened to it?"