Found a moose that went through the ice once and there was a small patch exposed where the animals tunneled down inside and were essentially hollowing it out under the ice. Caught a marten once by the hind foot and it was hanging dead/ frozen. A shrew tunneled in through its butthole, the fur was fine. Had a marten squeeze through a trap ring once and had a heck of a time getting him back through it. There was a spot on one of our traplines where there was a mound of rocks and the snow would always melt off it and it would sometimes steam. Just a few off the top of my head
One spring boating up an interior river I seen a marten hanging by its front foot on a pole set. Same thing.....shrews tunneled in through the butt and it was mostly hollow with some freeze drying.
Was a nice conversation piece in my house for several years!
I too have seen that shrew procedure. They are vile creatures !
I had the same thing happen to a beaver under the ice. I set the snares and then the temperature dropped to 50 below for about 8-10 days. Needless to say there was a lot of ice on that hole when I got back to it.
BUT....I had a very large beaver in a snare but something......either little fish or some other small organism had eaten that beaver from the inside. It looked like an old suit coat on a hanger when I pulled that snare up. Whatever did it never heard of clean skinning ! The hide was perfect though.
A couple more odd occurrences...... Early November one year i saw where a beaver was breaking ice at one of his slides and coming out for a few last bites of fresh bark. I set a 330 and the next morning I had a beaver..... he was pretty badly torn up. There was no snow to show tracks but i figured it was an otter since they used that same area.
I skinned what was left and staked the carcass in about three feet of water and reset that 330 just under ice edge ahead of the beaver.
Next morning I had a wolverine in that 330 completely submerged. Just the tip of his tail was floating.
Also had a beaver hit a 330 while I still had the springs in my hands.....setting it in front of his entrance.
That was like a lightning bolt going off in my hands !