Crouching to get past an obstacle (such as a tree branch) can represent the idea of handling a challenge in order to continue making progress in your life.
Crouching to avoid harm or injury can represent a real-life feeling or fear of a physical, emotional, or mental threat.
Crouching to hide can represent feeling the need for self-protection, or the idea of doing something secretive, manipulative, or dishonest (such as lying).
See also: Avoiding; Low; Crawling; Hiding