Activity 1 & 2: I find loons, hummingbirds and frigates pretty fascinating.
Activity 3: It is winter here in Minnesota so there are not a lot of birds around. I do enjoy seeing and hearing (mostly) the Black-capped Chickadee. They are often active around my neighborhood. I also see and hear… Blue Jays, Crows, and White-breasted Nuthatches and an occasional Pileated Woodpecker.