* Insulation: Fur provides a layer of insulation, keeping them warm in cold environments and cool in hot environments.
* Protection: Fur offers some protection from physical injury, such as scratches and bites.
* Camouflage: Fur can help gerbils blend in with their surroundings, making them less visible to predators.
* Communication: Gerbils have specialized fur on their tails that they use for communication. For example, they may raise their tails to signal alarm.
* Sensory: Gerbils have sensory hairs on their faces and bodies that help them navigate their environment and detect changes in their surroundings.
In short, fur is essential for gerbils' survival and well-being. It provides them with a number of advantages, including insulation, protection, camouflage, communication, and sensory input.