Question
UNKOWN BIRD
I saw this bird among other pigeons on a sidewalk by Prospect Park in Brooklyn, NY. It is pure white with yellow beak and red eyes.
AnswerFrom your description and the distant photo, I see no reason why it couldn't be an albino. It could be a spontaneous mutation, or a hidden recessive in the local population. Dr. Hollander kept a few albinos, but I don't recall if there were any physical abnormalities associated with this trait or not.
Dave