Yoga poses are named after animals, so it is therefore not surprising that animals are doing the yoga poses. Below are some pictures I found of animals in some familiar yoga poses.
Flamingos do the tree pose naturally when they are standing.
A squirrel doing the “plough” pose.
Supta Padangustasana A (Sleeping Big Toe Pose)
A duck stretching to Warrior 3.
A dragonfly in full focus and stillness in the feathered peacock pose.