Lyrics:

He is hunted for fur.
He's made into hats.
He deserves better than that.
Now that you have a clue can you tell me who is it?

He's a hydraulic engineer,
but he's shy.
Now, that you have a clue can you tell me who is it?

He opens habitats on nature's frontier,
and you might say it's his 'habitual' career.
Now, that you have a clue can you tell me who is it?

Natural fluidity channeled by castoridae, see?

The evidence of ancient dams suggests an origin to prairies & wetlands
Now, that you have a clue can you tell me who is it?

Hunted for fur.
Made into hats.
He deserves better than that.