Andy Russel spoke and wrote about River Otters in the Waterton drainage.
Andy spun a great tale, almost always based off of the truth.
From his short story "The Otters", one could infer that Otters in this neck of the woods had been extirpated early on in the explorer and trapper era, with some surviving across the divide in BC. This is where the otters in southern Alberta returned from....
Which begs the question, Can you believe an outdoor writer?