The bulk update request #10540 is pending approval.
change category ambient_flier (2532) -> invalid
Reason: This feels too specific to me. I don't think it's helpful to tag the locomotion of an ambient creature.
Alternatively I was thinking perhaps we could have an umbrella ambient_creature tag that all the ambient_* species tags imply, and then bad ambient tags like this one could alias to it. If folks like that idea I'll make another BUR.