With over 6,900 black and white negatives in the Bell Museum of Natural History records, we know of at least one that is true in coloration:

– Albino Grackle, circa 1940

To learn more about color abnormalities in birds, read The Cornell Lab of Ornithology’s overview, or peruse “The Incidence of Albinism in North American Birds,” a report written by Alfred O. Gross that was published in the journal Bird-Banding in 1965.