Thanks! I was actually only there to take pictures and record some wind sound effects for work, so we didn't see many animals besides bald eagles and small birds. Apparently the salmon run is only a month or so away...we just barely missed it!
And as far as I know, there aren't any large predators on the island. There are caribou on the southern part of Adak, but that whole area is a combination of wildlife reserve and hunting ground, so we didn't end up going down that way. Maybe next time I head out there I'll try to hike in that direction!