Paris has had it for at least a few months that I've noticed. I thought it was just a rogue feather but I'm wondering if it might be some other strange thing or a preen gland?
Ha, she was preening so I grabbed the camera when I saw it...I just stood around for 5 minutes.how did you get her to stay still and the feathers to stay parted just right? Great pics!
ETA: Ohh, weird and neat! I just googled "preen gland" in images, I didn't know it could be so easy to see! Are there any birds that don't have it?