Warrens are underground burrows or tunnels created by animals, primarily for shelter and nesting. They are commonly associated with small mammals like rabbits and rodents, providing a safe space from predators and harsh weather. These structures can be quite complex, featuring multiple entrances and chambers. In addition to serving as homes, warrens play a crucial role in the ecosystem. They help aerate the soil and promote plant growth by allowing water and nutrients to penetrate deeper. The presence of warrens can also indicate a healthy population of wildlife in an area, contributing to biodiversity.