Need Help Identifying Some Critters

I'm ashamed to admit that I don't know what they are,

This was taken a few days ago,
http://www.fullmeltbubble.com/galler...0/IMG_0083.JPG

The next 2 pictures were taken an hour ago, the thing just strolled right by my window.
http://www.fullmeltbubble.com/galler...0/IMG_0284.JPG
http://www.fullmeltbubble.com/galler...0/IMG_0280.JPG

Now on these next 2, judging by the tail this must obviously be a beaver, but god damn is it huge!

http://www.fullmeltbubble.com/galler...0/IMG_0275.JPG
http://www.fullmeltbubble.com/galler...0/IMG_0276.JPG

First critter kinda looks like a marmot, but never seen one of those swimming. Ya second one is beaver. Peace GS

First looks to possibly be a muskrat. Second definately a beaver.

Marmot and a Beaver.

Paz y mas...

marmot as in groundhog right? thanks guys

also i think deleting the images from the gallery also deleted them here, i'll upload again shortly.