"Crouching Eagle" can be a yoga pose or even a play on the movie title "Crouching Eagle (Tiger), Hidden Dragon". One could almost imagine an eagle being mistaken for a dragon, with its wing span, large head & beak and those magnificent talons.
This particular Bald Eagle flew into a grove of trees and chose to land on a broken tree, before departing.
Maybe it assumed this position because of the nature of the perch or perhaps for a quick get away. All that mattered was for a very short period, it allowed some quick shots of a magnificent bird.