There are several ways seeds get dispersed by animals. One example are the burrs that stick to your socks and pants when you walk through grassy fields. The parent plant makes the spiky little burrs from the flower. These burrs are either thrown off the plant and onto the ground, or they stay on the plant until a passing animal (or person) gets the burr in its fur, feathers, or socks. Then the burr is carried to a new place, where animals usually try to get it off themselves. Animals , scratch, or peck at the burrs to get them off. The burr is then dropped on the ground, away from the parent plant. Many grass seeds have surfaces which catch onto passing creatures. For instance spear grass has spiky tips that can get stuck in passing animals or blown by a strong wind to a new place.