I wish all future avian artists use this genitalia as an example. We know birds dont have external genitalia, but to make this art interesting, sometimes a penis is needed, and a tapering penis fits birds perfectly since it is a believable member that would still allow flight, and is the best looking imo.

Imagine trying to fly with a big ole set of balls and a floppy dick hanging out....shits hard.....trust me. ¬_¬

Oh hey it's the pic from this story