hummingbird, Rufous Female, breaking the topmost water bubble from the fountain spray with her beak. You can see the spray above and below her beak here.
Also by the same photographer:
hummingbird from a different view, atop the water droplets from fountain. Reminds me of a bumble bee here :) Note the little dash of bright red iridescence on it's throat in this shot. Don't know if its an immature male or female.
Photo credit: Alandrapal