Silhouette: Becky Barnes · PhyloPic
Sorex pacificus
In 3 days ~10% in a week ~30%
The Pacific shrew (Sorex pacificus) is a species of mammal in the family Soricidae. It is endemic to western Oregon in the United States. The Pacific shrew is native to western Oregon, more specifically from the Siltcoos lake to the coast going from the border line of Douglas and Lane counties continuing south to the northern parts of California. The first documented Pacific shrew to be caught was found at the mouth of the Umpqua River in 1858. They are normally found in damp areas along creeks in forests and sometimes near collapsed trees. Their refuge is of the utmost importance and they are seldom found far from it. This includes collapsed trees or dense vegetation. They use the flora to build a nest, gathering small plants such as grass, moss, lichen, or leaves into a pile and pushing themselves into the middle.
They are the largest brown shrew in western Oregon. They weigh only 10 to 18 g (0.35 to 0.63 oz) and their length (including the tail) is 135 to 160 mm (5.3 to 6.3 in). In the summer time they have short, red-tinted brown hair, which gets longer and darker moving into the colder seasons. Their feet and tails are usually a tan color with the possibility... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Bear Rainforest | 🇨🇦 Canada |
More parks will be added in future updates.
No species of the same family or order lives in Great Bear Rainforest, so these are its closest relatives here: other mammals.
With luck
About 10% of wildlife watchers report a Pacific Shrew sighting in Great Bear Rainforest on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 29th most-seen of the 35 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.
February, April–May and July–September
In those months about 10% of wildlife watchers report a Pacific Shrew in Great Bear Rainforest on a given day, against under 5% in March, June and October–January, the lowest months.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Pacific Shrew sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Only Great Bear Rainforest, in our data
Great Bear Rainforest is the only park on Wallace's Line with enough records to rate Pacific Shrew sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Pacific Shrew is recorded against all the mammals logged in Great Bear Rainforest (6 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.
