Yoga postures with birds' name

Pigeon posture for praying on 3.11.
There're quite a lot variations of this posture.
Many yoga postures has bird's name.
Pigeon, peacock, hawk, eagle, swan, crow and bird of paradise.
Though they are not birds but with wings, air plane, butterfly.
Human  beings do not have wings,
therefore we long for everything with wings.
If we can fly, necessary exercise may change.
Wings, chest and torso?
Kazuyo in a picture focuses on opening chest comfortably.
If you place your back leg on the floor with your hip facing front and bend forward,
you can stretch backside of your hip, that is also very comfortable.