I got this idea after going to an aquarium and taking some snapshots of several animals. As well as this one penguin that always turned around and stuck out its butt whenever I got my camera out.

John would be a dwarf epauletted fruit bat (This is because John's almost blind without his glasses and bats rarely use their eyes when they can just use echolocation. I also choose this particular bat because it looks adorable.)

Paul would be a flamingo...

Paul: It's because they're pink right?

... Yeah. And it's also because they look pretty damn sassy with the way they pose and preen themselves.

George would be a yellow anaconda (This snake can swallow anything whole, even if the prey's larger than the snake. Now I don't know if George can stretch his jaws or rib-cage to eat huge meals but he does have a voracious appetite so it fits.)

Ringo would be a penguin. (They're quite possible the cutest animals in existence! They're so clumsy and lovable and cuddly, just like Ringo.)