We had some beaver activity a few years back, they didn't stay long but it was interesting while it lasted. I never actually saw them but I did hear that charateristic clap on the water a few times. They compete with coypu 'round these here parts.
Unfortunately, most of the photos I took were on Photobucket which are lost forever now but I did post a few on FB.
It took them a few nights to bring this tree down. ( the dog, GSD size, kindly stepped in for scale)
No idea if it was by design or luck but the tree not only fell perfectly between other trees but also landed at the river's edge where the bark could be eaten in safety.