That bird had legs that wouldn’t quit, and an unblinking stare that looked right into your soul. She kept pleading with me to tell her “Who? Who?” but I had no answers.
It's not something ever learn directly, but nonetheless we all seem to inherently know it. Why this order? Who knows! It's one of many weird quirks of our language (and some others). It's certainly a hard thing for non-native speakers to pick up on.
Those are jesses used to let the handlers keep ahold of the bird while on their glove, as well as tether the bird to a perch. So basically the bird version of a leash.