Yes, a woodchuck. Look at the tail. Lol They do look similar to Nutria and are of the same basic clan. Nutria have webbed feet, not so with the Eastern Woodchuck, nor it's Western cousins, various marmots. Also, every picture I see of Nutria, the teeth are VERY orange and somewhat longer than woodchuck's white or yellowish teeth.

Here's a Nutria.