My father-in-law and I watched these two rufous hummingbirds on his back deck for the longest time. The one dominant hummingbird (on the left) would chase off any others that wanted to drink from this feeder.
Taken in Breckenridge on July 31st, 2011.
I wish I had used a slightly wider aperture with this photo. The hummingbird on the left is beyond the depth of field and slightly out of focus.