The deer mouse (Peromyscus maniculatus) is a small rodent native to North America. It is part of the family Cricetidae, which includes other small rodents such as voles and hamsters. Deer mice are known for their adaptable nature and are found in many habitats, including forests, grasslands, deserts, and agricultural fields. They are characterized by their distinctive bi-coloured fur, darker shades on their backs and white underbellies, and large ears and eyes, which enhance their nocturnal activities. Deer mice are excellent climbers and jumpers, aiding their foraging and escape from predators. They play a crucial role in their ecosystems, serving as both prey for various predators and as seed dispersers. However, deer mice are also known carriers of the Hantavirus, which can lead to Hantavirus Pulmonary Syndrome (HPS) in humans, a rare but potentially fatal respiratory disease. The transmission can occur through inhalation of dust contaminated with their urine, droppings, or saliva. Due to their widespread presence and proximity to human environments, understanding the habits and characteristics of deer mice is essential for both ecological study and public health considerations.