Tamias senex
Silhouette: Chloé Schmidt · PhyloPic
In 3 days ~50% in a week ~80%
Allen's chipmunk (Neotamias senex), also known as the shadow chipmunk, is a species of chipmunk native to the western United States. Occurring in California, Oregon, and Nevada, it is a common species of the Sierra Nevada.
Allen's chipmunk's total length measures about 229–261 mm (9.0–10.3 in), with a tail length of 90–111 mm (3.5–4.4 in). Adults weigh 66.8–108.5 g (2.36–3.83 oz), with females being larger than males on average as the species exhibits a dimorphism ration of 1.033. The coastal subspecies (Neotamias senex pacifica) is characterized by an overall dark fur complexion with indistinct dorsal stripes, similar to that of Neotamias townsendii. The inland subspecies (Neotamias senex senex) have a much lighter complexion, with brownish-yellow fur tinged with smoky gray. During the summer and winter, it displays a distinctive black median dorsal stripe along its back.
The coastal subspecies is found solely in the redwood forest belt of California that extends from the Pacific coast to about 32 km (20 mi) inland, and ranges from the Eel River of Humboldt County in the south to the Klamath River of Del Norte County in the north. The inland subspecies... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Redwood National Park | 🇺🇸 United States |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Shadow Chipmunk sighting in Redwood National Park on a given day, based on 39 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 9th most-seen of the 23 mammals we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
April and August–September
In those months about 30% of wildlife watchers report a Shadow Chipmunk in Redwood National Park on a given day, against under 5% in February–March and December, the lowest months. Those are among Redwood National Park's driest months, with about 75 mm of rain a month against 360 mm in January.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Shadow Chipmunk sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Redwood National Park, in our data
Redwood National Park is the only park on Wallace's Line with enough records to rate Shadow Chipmunk sightings: about 20% of wildlife watchers there report one on a given day.
Same family: Sciuridae
The closest relatives of the Shadow Chipmunk that you can see in Redwood National Park (family Sciuridae, Squirrels) are Douglas' Squirrel (about 30%) and Western Gray Squirrel (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Shadow Chipmunk is recorded against all the mammals logged in Redwood National Park (39 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.
