
Deer Mouse
Also known as a field mouse, the deer mouse is so-called because the fur on the top of its body is a distinctive fawn colour, a kind of brownish gray. Their undersides are white, and the fur of their bodies transitions colour gradually. Deer mice are also recognizable by their two-toned tail, which is light on the bottom and darker on the top. In the wild, deer mice gather plant material to make nests in trees or in burrows that they dig themselves. If they get into homes, they may shred paper or fabric for nesting material and make nests in attics, basements, or wall voids. Deer mouse family groups typically do not interact with one another, but deer mice cannot be said to be solitary as, like other mice species, they can reproduce every 21 days. Deer mice are known to carry dangerous diseases that can infect humans, such as Lyme disease, babesiosis, and Ehrlichiosis. However, perhaps the biggest disease threat from deer mice is hantavirus. This is a respiratory disease with no cure and no vaccine. It causes severe symptoms that require hospitalization, and approximately one-third of all patients do not survive.
White-footed Mouse
The white-footed mouse is related to the deer mouse. Therefore, the two species look similar and are often confused with one another. The white-footed mouse tends to be shorter than the deer mouse. Like the deer mouse, the white-footed mouse has white fur on the underside, darker fur on the top of its body, and a two-coloured tail. However, the deer mouse is grayer while the white-footed mouse is more of a reddish-brown. Compared to the deer mouse, the white-footed mouse's eyes are larger and more protuberant. The white-footed mouse typically avoids humans due to its timid nature. When it does make a home in human habitation, it lives on the ground floor. Like the deer mouse, the white-footed mouse can carry hantavirus. It is also a reservoir for a bacterial species called Borrelia burgdorferi, which causes Lyme disease.