Casey Twirls His Feather

Our cockatiel, Casey, does a copious amount of molting.  When he loses a major feather, he often plays with it afterwards.  He holds it in his mouth, chews on it like a farmer with a stalk of straw, and twirls the feather.  This feather is half gray and half white - a wing feather.

Here's Casey chewing on the feather.

Twirling off to the right.

And off to the left.

Applause?  Why, thank you!  Always enjoy performing.