Monochamus obtusus
In 3 days ~20% in a week ~40%
Monochamus obtusus is a species of beetle in the family Cerambycidae. It was described by Thomas Lincoln Casey Jr. in 1891. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yosemite National Park | 🇺🇸 United States | |
| 2 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 3 | Redwood National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Monochamus obtusus sighting in Redwood National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 85th 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
In that month about 20% of wildlife watchers report a Monochamus obtusus in Redwood National Park on a given day, against under 5% in August and October–June, the lowest months. That is one of Redwood National Park's driest months, with almost no rain against 360 mm in January.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Monochamus obtusus sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 parks where we can rate Monochamus obtusus sightings, Redwood National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Yosemite National Park (United States, about 10%) and Sequoia and Kings Canyon National Parks (United States, about 10%).
Same family: Cerambycidae
The closest relatives of the Monochamus obtusus that you can see in Redwood National Park (family Cerambycidae, Longhorn Beetles) are Evodinus monticola (about 10%), Dorcasina matthewsii (about 10%) and Scripted Long-Horned Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Monochamus obtusus is recorded against all the insects logged in Redwood National Park (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.
