Aliasing balancing_on_tail → tail_stand
Link to alias

Reason:

furrypickle pointed out these were identical in post #181331. The Balancing tag is a recent creation. Tail_stand may be older, but is hard to find (though could be less so after aliasing) and has barely 30 posts (even less since I wouldn't include snakes in that tag).

Basically this aliasing could go either way, so discuss away.