It could be leucistic, also known as partial albino, full albinos have white feathers, pink feet and bill, and red eyes. I say this only because I cant see the feet. But just by going off of what I see it is probably a true albino. Which are more rare than a partial albino obviously.

Very pretty birds to watch and marvel at their ability to fly in just about any angle they wish to. Did some research for my biology degree on hummingbirds in general, very fascinating birds. Great picture B-man!