Lawn invaders are a common problem for homeowners, as they can cause damage to the grass and other plants in the yard. Crabgrass, MOLE, WEED, and chickweed are all examples of lawn invaders. Crabgrass is an annual grassy WEED that spreads quickly and can be difficult to control. Moles are small mammals that tunnel underground and can cause damage to the roots of plants. Weeds are plants that grow in unwanted places and can compete with desirable plants for resources. Chickweed is a low-growing WEED that can spread rapidly and is difficult to remove. All of these lawn invaders can cause significant damage to a lawn if not properly managed.