Other otter traces (feeding grounds, caves, entry points, swimming tracks) | Do not count as concrete evidence since they are not clearly assignable! |
There are many reasons for a collection of fish scales on the ground: anglers, raptors, minks or even muskrats | |
Even with dead frogs it is difficult to assess | |
It`s difficult to tell which animal created and used a cave in the embankment or close to the water. Only | |
Which animal used these entry points is only possible to distinguish with animal tracks- if there are any to be found. | |
Swimming tracks –like these— or traces of bubbles underneath the ice may have multiple causes and do not have to be necessarily created by an animal. |