Here are some pictures of North Americas largest rodent, the Beaver as well as photos of Woodchucks or Groundhogs. Since there are not too many Beavers left in Canada they can sometimes be hard to photograph, but with good luck you will see these large rodents and can even get close to them. When they get startled they will slam their tail into the water and dive. The other mammal in this post the Woodchuck makes their buroughs along hillsides and river banks, and are often seen in Late March or Early April.
Here are my photos.