This weird-looking dude showed up at the platform feeder a couple of weeks ago. He's a leucistic common grackle. What caused his tail to be white is anyone's guess. Was it a flaw in his genetic material? The result of an injury or some dietary anomaly while a nestling? A fashion statement?
It's been a big blackbird year around the farm with larger-than-normal numbers of red-winged blackbirds and common grackles hanging around, visiting the feeders, foraging on the lawn.
I always enjoy it when we have these "marker birds" around—birds with a noticeable and often odd physical attribute. We've had bluebirds with a drooping wing or messed-up alula feathers. We've had a partially white junco. For one winter we hosted a tufted titmouse with an overgrown upper mandible. These are all birds that are easy to notice and keep track of because their physical anomalies make them stand out as individuals.
The current issue of Bird Watcher's Digest features an article about a juvenile rose-breasted grosbeak that lacked a beak! If the photos of this rose-breasted no-beak don't freak you out, try watching the video in our digital edition. Freaky!
By the way, here's your obscure fact for the day: Albinism in birds is caused by an absence of melanin in the feathers and body. This usually results in birds that are totally white with red or pink eyes. Leucism is caused by uneven distribution of melanin in the feathers and body, resulting in pale-looking birds or birds with patches of white.
Our white-tailed common grackle (which is leucistic, not albino) stayed around for a few days and then moved on. But if he returns, we'll certainly notice.