And I was out in the boreal just recently with a couple and their 2 kids canoeing a quiet river full of wild rice and also having a number of beaver lodges on it like the one you photographed here. I would tend to think that if the lodge you photographed has new cuttings on it, it would be beaver inhabiting it. Otters are fish eaters.
Aside from the wild rice and otters, we also saw a few mallards, Canada geese, a mother loon and young, a bald eagle and it's huge nest, turkey vultures, a few ravens, crows, mergansers, green winged teals, scaup etc...
The wind blew against us for the whole trip in to where we camped and we had to work to get there. It blew even harder the next day but this time in our favor. That was a blessing and we made good time on the way out.
I was able to take one of the boys out onto a lake we had paddled into and teach him how to manage the canoe in the howling breeze that we ran into on day two. He really liked that.
I think my favorite part of the canoeing was when we came across early, golden, morning light streaming into a stand of burnt black spruce, backlighting them and separating them from a backdrop of the brilliant lime greens of white poplars and the black, mossy walls of granite; and in the forground: more separation by the brilliant greens of unripe wild rice preceeded by the dark, bronzy blacks of boreal river water which, of course, is always bedazzled by the cerrulian blues and whites of sky and cloud color.
The heavens truly do declare the glory of God and the firmament His handywork.