Some sloth-texts: Flanders and Swann, in the old pronunciation slowth:

For days and days among the trees
I sleep and dream and doze,
Just gently swaying in the breeze
Suspended by my toes;

While eager beavers overhead
Rush through the undergrowth,
I watch the clouds beneath my feet …
How sweet to be a Sloth!

Ogden Nash on same:

Said the slothful tree toad to the three-toed sloth,
Is it true you are lazy enough for us both?
I don’t bother to scratch even when mosquitoed,
Said the three-toed sloth to the slothful tree toad.

I like Roethke’s take:

In moving-slow he has no Peer.
You ask him something in his ear;
He thinks about it for a Year;

And, then, before he says a Word
There, upside down (unlike a Bird)
He will assume that you have Heard —