[Tweeters] More info : Black-Capped Chickadee with white tail feathers

[dgrainger at birdsbydave.com]

I don't think that this is a leucistic bird: only the tail feathers are 
affected, all but one tail feather is white and one  remains normal 
color. Here's a link to an article which I found in pursuing my 
curiosity about the bird: 
https://academic.oup.com/beheco/article/17/6/1046/319763

My best guess now is that this was a a "fright molt" instance. We do 
have a neighbors cat, and have put up a wire barrier around the bird 
mound and feeders. Nonetheless, the little feline still tries very hard 
hoping we are not watching. I also found a couple of blogs mentioning 
that Black Capped Chickadees can replace the feathers with white ones 
after a fright molt nd that subsequent molting will replace those with 
normal.  Anyone wanting to see the white tailed Black-Capped can send me 
a private email here. I also will be putting the photo on my website 
later today [Sept 30]