Why do parakeets do this?

Question

They move from one foot to the other really fast, swaying from side to side. They sit in a window and they each have a mirror with a perch. They sit on the perch facing the mirror/outside and do this for a long time.

Answer 1

something to do. The mating dance.

Answer 2

the dancing is...well...just that, a dance.  they do if for play when they are excited.  As for looking at the mirror, they are fascinated with themselves and think its another bird.  Just normal behavior.

Answer 3

if you've a male and female, it might be a mating ritual!