Dorcasina matthewsii
In 3 days ~20% in a week ~40%
Dorcasina matthewsii is a species of flower longhorn in the beetle family Cerambycidae. It is found in North America and was described by John Lawrence LeConte in 1869. Dorcasina matthewsii is sometimes spelled "Dorcasina matthewsi". Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Redwood National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Dorcasina matthewsii sighting in Redwood National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 62nd most-seen of the 101 insects 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.
July and August
In those months about 20% of wildlife watchers report a Dorcasina matthewsii in Redwood National Park on a given day, against under 5% in September to May, the lowest months. Those are among Redwood National Park's driest months, with about 10 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 Dorcasina matthewsii sightings with a recorded time, and nearly all 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 Dorcasina matthewsii sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Cerambycidae
The closest relatives of the Dorcasina matthewsii that you can see in Redwood National Park (family Cerambycidae, Longhorn Beetles) are Evodinus monticola (about 10%), Scripted Long-Horned Beetle (about 10%) and Monochamus obtusus (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dorcasina matthewsii is recorded against all the insects logged in Redwood National Park (8 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.
