Peromyscus mexicanus
Silhouette: Nina Skinner · PhyloPic
In 3 days ~10% in a week ~30%
The Mexican deer mouse or Mexican deermouse (Peromyscus mexicanus) is a species of forest-dwelling rodent in the family Cricetidae. It is a species of the genus Peromyscus, a closely related group of New World mice often called "deermice". It is found in southern Mexico and throughout much of Central America.
Mexican deer mice are moderately sized mouse-like animals with narrow, slightly elongated, heads and long tails. They have a combined head and body length of 9 to 12 centimetres (3.5 to 4.7 in), and a tail 10 to 13 centimetres (3.9 to 5.1 in) long.
The fur is soft, short, and generally rufous or russet in color. However, the general body color varies with geographic location, and with the time of year, being generally paler in drier climates or during dry seasons. At the extremes, it may vary from nearly black to pale grey.
The underparts and feet are creamy white, with brown or rufous fur on the upper parts of the limbs. There is a patch of almost blackish fur at the base of the whiskers, and a dark ring around the eyes. The fur on the tail is sparse and very short, making it almost invisible on casual examination; a feature that distinguishes the Mexican deer... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Mexican Deer Mouse sighting in Monteverde Cloud Forest Reserve on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 26th most-seen of the 28 mammals we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
September and November–January
In those months about 10% of wildlife watchers report a Mexican Deer Mouse in Monteverde Cloud Forest Reserve on a given day, against under 5% in February–August and October, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Mexican Deer Mouse sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Only Monteverde Cloud Forest Reserve, in our data
Monteverde Cloud Forest Reserve is the only park on Wallace's Line with enough records to rate Mexican Deer Mouse sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Cricetidae
The closest relatives of the Mexican Deer Mouse that you can see in Monteverde Cloud Forest Reserve (family Cricetidae, Hamsters, Voles, Lemmings, and Allies) are Watson's climbing rat (about 10%) and Sumichrast's Vesper Rat (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mexican Deer Mouse is recorded against all the mammals logged in Monteverde Cloud Forest Reserve (5 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.
