I see Lontra canadenis (river otter) on my coastal ventures. On rarer occasions I will see Neovison vision (American mink). We spotted this mink passing below us on the beach on the north shore of Orcas Island. I was struck by its comfort of being so much out in the open.
The same day and not very far away we heard screeching that I initially assumed was a hawk. Instead it was two minks rolling down the bluff slope and biting at each other.
My take was that this was not a fight but was mating - but I am no expert on the ways of mink courtship or dueling and found the encounter confusing. I will say that the minks in question seemed rather oblivious to my presence with their full attention on each other.