What is the special bump for? I have seen some birds have different edges on feathers to help them fly silently, and some others have wings that whistle as an alarm to other flock mates when they take off in a hurry. Absolutely fascinating stuff.
Its cool right? I guess called a feather notch. A special adaptation thought to help them hover. I thought only quakers had. But
@Winn found an old AA thread and
@Mizzely mentioned a couple of other parrot species have the feather bump adaptation.
It is fascinating stuff!! All unique feathers and sound if flight.
My quakers normally do a noisy flight as feathers/ wings make noise while flying. Why they bother when my quakers normally vocalize during flight!
But my quakers are able to a silent flight when they want to be sneaky
so they are able to adjust wing/feather sounds. As are other species which is fascinating!