* Insulation: Hair helps rats regulate their body temperature, keeping them warm in cold environments and cool in hot ones.
* Camouflage: The color and pattern of a rat's fur can help it blend into its surroundings, making it harder for predators to spot them.
* Sensory function: Rat whiskers (also known as vibrissae) are highly sensitive hairs that help them navigate their surroundings, detect changes in air currents, and sense objects in the dark.
* Communication: Some rats use their fur for social communication. For example, they may groom each other's fur as a sign of affection.
* Protection: Hair provides a slight layer of protection from minor scratches and scrapes.
Overall, hair is an essential feature for rats, playing a vital role in their survival and social interactions.