And in this cage, ladies and gentlemen, we have the triangular arsehole bird.
A most peculiar bird, it eats only sand and can shit only every few millennia.
The first times it produced the pyramids, and most recently,
it produced the YMCA.

[the symbol for the YMCA was (in the early 60s) a triangle and, in Melbourne, the building was triangular in plan]
Also from the same era and location;

And, in this cage, ladies and gentlemen, we have the cryptic churchmouse.
Very discreet, it crept into the crypt, crapped and crept out again.

Cheers, Rowan