If you got beaver escaping from being neck snared, you need new snares or a new snare support.
Hmmmm. How many on-land neck snared beaver do have video of so you are sure none have escaped? And what is your setup? Maybe my over a thousand documented beaver snared on land is not enough and I still have something to learn…
It is not many, but it happens. At least with my possibly second-rate setup. Occasionally one stops fighting before the snare gets fully tight (or does not pull at all!) and manages to scratch the snare off with the front feet. I don’t see how a different setup will change that unless it is a powered snare. Oh, and when I inspect the snare there is often no evidence of it having caught a beaver, because it was only caught for seconds or a minute at most, and it is just pulled down to about a 3-4” loop wth no kinks in the cable or signs of disturbance. Just like it is if one drags a limb past it and pulls it down, or any number of other ways that snare can miss. I was only able to see what happened after reviewing the video. Have you ever found a snare like that and wondered what happened or what animal did it? Once they give it a good tug, they wont escape, but some don’t ever give it that tug. Maybe one in 50. And thats too much for me when it is zero for body catches - get a leg through and they are not able to pull it off with the front claws. But again, maybe it is my snares or my support. Do tell, what is the magic setup and maybe I will make some up and start running video on them to test it. But on second thought that seems like a lot of work (that I have already done) when I can continue to body catch them and not worry about it.
All of that said, there is a slight risk when setting like Swamp and I do, and that is that maybe one in 100 or 200 (I have 3 videos where it happened of around 500) will manage to walk right through without closing the loop. But in two of those cases, they came back down the trail and were caught going the other direction because the snare was still functioning.
There is another big advantage to setting a bigger loop closer to the ground, and that is raccoons. 80-90% of them will nimbly walk right through it without disturbing anything. I have many many videos that show multiple raccoons walking right through, then along comes a buck-tooth mud shover and it is waiting for me…