Peromyscus maniculatus
Silhouette: Nina Skinner · PhyloPic
In 3 days ~20% in a week ~40%
The eastern deer mouse (Peromyscus maniculatus) is a rodent native to eastern North America. It is a species of the genus Peromyscus, a closely related group of New World mice often called "deermice". When formerly grouped with the western deermouse (P. sonoriensis), it was once referred to as the North American deermouse, a species that is no longer recognized. It is fairly widespread across most of North America east of the Mississippi River, with the major exception being the lowland Southeastern United States.
Like certain other Peromyscus species, it can be a vector and carrier of emerging infectious diseases such as hantaviruses and Lyme disease. It is closely related to Peromyscus leucopus, the white-footed mouse. The species in its former broad sense had 61 subspecies, but some of these now belong to P. sonoriensis. They are all tiny mammals that are plentiful in number. The eastern deermouse is a small rodent that lives in eastern North America and is closely related to the white-footed mouse, Peromyscus leucopus. Because the two species are extremely similar in appearance, they are best distinguished through red blood cell agglutination tests or karyotype techniques... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Isle Royale National Park | 🇺🇸 United States | |
| 2 | Redwood National Park | 🇺🇸 United States | |
| 3 | Channel Islands National Park | 🇺🇸 United States | |
| 4 | Glacier National Park | 🇺🇸 United States | |
| 5 | Jasper National Park | 🇨🇦 Canada | |
| 6 | Acadia National Park | 🇺🇸 United States | |
| 7 | Banff National Park | 🇨🇦 Canada | |
| 8 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States | |
| 2 | Seattle | 🇺🇸 United States | |
| 3 | Edmonton | 🇨🇦 Canada | |
| 4 | Vancouver | 🇨🇦 Canada | |
| 5 | Montreal | 🇨🇦 Canada | |
| 6 | Calgary | 🇨🇦 Canada | |
| 7 | Toronto | 🇨🇦 Canada | |
| 8 | Chicago | 🇺🇸 United States | |
| 9 | Washington | 🇺🇸 United States | |
| 10 | Los Angeles | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Deer Mouse sighting in Glacier National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 22nd most-seen of the 27 mammals we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June to August
In those months about 10% of wildlife watchers report a Deer Mouse in Glacier National Park on a given day, against under 5% in September to May, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Deer Mouse sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 8
Of the 8 parks where we can rate Deer Mouse sightings, Glacier National Park ranks 4th at about 10%. The best odds are in Isle Royale National Park (United States, about 30%), Redwood National Park (United States, about 10%) and Channel Islands National Park (United States, about 10%).
Same order: Rodentia
The closest relatives of the Deer Mouse that you can see in Glacier National Park (order Rodentia, Rodents) are Columbian Ground Squirrel (about 80%), Hoary Marmot (about 60%) and Golden-mantled Ground Squirrel (about 60%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Deer Mouse is recorded against all the mammals logged in Glacier National Park (7 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
