Name That Animal

So the unemployed boy next door was complaining that something had eaten all of his annuals. He thought it was a woodchuck, so the other day he went out and bought a trap. He knocked on my door this morning, trap in hand. Inside was one of these animals. Poor boy - even though he grew up in Minnesota, he didn't know what it was.

I educated him with my marsupial knowledge and he went on his way.

P.S. It's an opossum, and the "o" is silent.