If it's a small animal like a rabbit, they'll be lower to the ground and their bodies will move the lower branches like this.
[Crouching down, he moves the lower branches as a simple demonstration.]
For a medium sized or larger animal, the bulk of the sound will be higher where their main body would hit, even if they are trying to crouch and crawl under. The sound will also be denser and crowded as more leaves and branches are hit.
Of course smaller animals could still hit the higher parts of the bush if they're climbing through the branches or there are several and make it appear something larger might be inside, but a trained ear has a chance at telling the difference.
no subject
[He walks over to the nearest brush.]
If it's a small animal like a rabbit, they'll be lower to the ground and their bodies will move the lower branches like this.
[Crouching down, he moves the lower branches as a simple demonstration.]
For a medium sized or larger animal, the bulk of the sound will be higher where their main body would hit, even if they are trying to crouch and crawl under. The sound will also be denser and crowded as more leaves and branches are hit.
Of course smaller animals could still hit the higher parts of the bush if they're climbing through the branches or there are several and make it appear something larger might be inside, but a trained ear has a chance at telling the difference.