Do Cardinals go bald?

[Dinusaur]

Yes, I mean the bird, Northern Cardinal. Last couple of weeks I have been seeing a cardinal in my backyard devoid of any hair on its head. This evening I managed to get a few pictures of him (see below), not of great quality; however, one can tell what's unusual about this one. Any idea why is this so?
 

[newfoundlander61]

Yes, this happens to blue jays also. It will normally come back with full feathers.

http://www.birds.cornell.edu/pfw/AboutBirdsandFeeding/BaldBirds.htm

[Dinusaur]

Thanks for the link Paul, it does explain why something like this happens.