I've never known hummingbirds really to perch but that may be from my lack of exposure to them. Come to think of it, they're members of the Order Apodiformes, which means "without feet," so I guess I'm not the only one.
Usually I think of them as constantly on the move, constantly searching for the next flower they'll feed from. This guy, however, was perched at the top of a tree right outside my mom's house in California for the better part of two weeks, singing and calling all day, every day.
Also, this guy taught me how difficult it can be to ID hummingbirds. Turns out there's about 6 species that are all basically the same bird.
Luckily I heard his calls, and I was able to match them up in my trusty ipod iBird app.