What is the average lifespan of a roof rat?

The average lifespan of a roof rat is generally around 2 years under typical living conditions. This lifespan can be influenced by various factors such as environmental conditions, availability of food, and predator presence. In managed settings, like urban areas where they are often found, roof rats can have a shorter lifespan due to higher mortality rates associated with human activity, traps, pesticides, and other hazards.

It's important to understand that while some individuals might live longer than 2 years under less intensive pressure, the average provides a reliable benchmark for pest control professionals. This knowledge helps in implementing effective control measures, as understanding the biology and behavior of roof rats can assist in preventing infestations and managing populations effectively.