In late summer, many of our birds are molting their feathers, picking up a new set of feathers before the long winter or before taking off on their migratory journey.
In most birds, their molt takes place in an orderly fashion, so much so that sometimes we can't even tell it's going on. But every August, a small number of birds in my local Blue Jay population molt all their head feathers at once. It can be quite a sight!
Though birds can lose feathers due to mites, lice, or other nutritional factors, when it happens at this time of year, you can almost bet that it is just an irregular total molt of the head feathers. But don't worry - the feathers WILL grow back and when they do, you'll have no evidence of which bird was a temporary baldy.
I hear about this happening most amongst Blue Jays and Northern Cardinals. In my yard, I've never seen it happen to any other of our regular visitors, even though the normal molt is clearly occurring.
The lack of head feathers does help you see a feature on a bird that you don't typically see: their ear openings (click on the picture above). These are typically covered by feathers called auriculars or ear coverts.
If you can't get enough of pictures of bald Blue Jays, check out these previous posts on The Zen Birdfeeder:
- If the Blue Jays are Bald, It Must be August
- Bald Blue Jays on our Flickr photostream
- More Bald Blue Jays
- Late Summer Yard Observations
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Evan - glad this helped! Thanks for visiting and y'all come back now hear?
DreamFalcon - yes indeed they do!
Larry - I agree that they have a vulture look. Especially when their neck is also very bare and their shoulders look bigger.
Slugyard - that's interesting that it doesn't affect other jays as well.
Posted by: The Zen Birdfeeder | August 22, 2010 at 03:58 PM
Wow- that is fascinating! We only have Scrub Jays and Stellar's Jays here, but I've never seen any of them go bald.
Posted by: Slugyard | August 22, 2010 at 10:07 AM
Great shots of these baldies Nancy! The bird in the first shot looks like a little vulture, only seeing the head and the all white breast feathers ;-) A cute little vulture, or course.
Posted by: Larry Jordan | August 21, 2010 at 07:43 PM
They do look a little spooky with that bold head.
Posted by: dreamfalcon | August 21, 2010 at 04:02 AM
I've been seeing a bald Blue Jay recently and was wondering what that was, if it was normal or mites, etc., so after reading your info, I found out it was normal, so thanks again.
Posted by: Evan | August 13, 2010 at 09:53 AM
Evan - glad to be of help!
Posted by: The Zen Birdfeeder | August 13, 2010 at 08:24 AM
Nice info and pics.
Posted by: Evan | August 11, 2010 at 08:39 PM
Sylie - Glad this post was helpful. And here's a link to buying Bark Butter online:
http://bit.ly/NVzIk
Posted by: The Zen Birdfeeder | August 11, 2010 at 12:35 PM
I found your blog while searching for an explanation to the half dozen bald blue jays visiting my yard. I am happy to find out it is not to worry about. I'd never heard of bark butter, I will try to find some in my area.
Posted by: Sylvie | August 11, 2010 at 10:35 AM