I'm Bat Bird
While doing its bat impersonation, it was almost perfectly perpendicular to the ground. All I can figure is that it was playing and showing off for me while I stood under it with my camera.
Quaker Parrot/Monk Parakeet (Myiopsitta monachus)
Quaker Parrotmonk parakeetparrotgreen and blue birdMyiopsitta monachuswild parakeetloudwhite rock lakedallas texaswinfrey pointtreeacrobatshowing offplayingupside down