Learned long ago from boat club and rugby club associates.

And in this tank ladies and gentlemen we have the Shark
The Shark is the most voracious feeder in the seas,
It eats seals, fish and the occasional passing swimmer
What was that lady? Does it swaller yer 'ole?
Nah, it spits it out when it comes to it.

And in this cage we have the Ozzle-Woozle bird
These birds fly in a single line with the largest bird in front followed by the next largest and so on down to the smallest at the rear
At the first sign of danger, the smallest bird flies up the behind of the bird in front and so on up the line
The single remaining bird then flies round and round in every decreasing circles until it disappears up its own fundamental orifice, from which advantageous position it proceeds to shower shit and derision in all direction.