Koala

A koala is haughty; he's really a snoot
he's a finicky eater and cranky to boot
a specialist, expert on issues of cute --
cute's where koalas are very astute.

Strong Quilled

A stoic sort you won't see cryin' --
There he is, the porcupyin.

Hmph

Owls and cats and insects with stingers
take a dim view of most other thingers.

Impressionable

Impressionable creatures like chipmunks and loons
should be kept far away from sarcastic racoons.