Burrows are underground tunnels or holes created by animals, primarily for shelter, nesting, or protection from predators. Many species, such as rabbits, moles, and groundhogs, dig burrows to create a safe environment for themselves and their young. These structures can vary in complexity, with some featuring multiple chambers and entrances. Burrows also play a significant role in the ecosystem. They help aerate the soil, promote water drainage, and provide habitats for other organisms, including insects and fungi. Additionally, burrowing animals contribute to nutrient cycling, making them essential for maintaining healthy ecosystems.