Omus dejeanii
In 3 days ~10% in a week ~30%
Omus dejeani is a species of flightless tiger beetle (Cicindelidae) that is found from British Columbia almost to northern California in dense, coastal forests. It can be found quite commonly in suitable habitats in the spring. It is most often collected with pitfall traps, but can be found walking along trails at night and on cloudy days during the right time.
Night-stalking tiger beetles (Cicindelinae: Omus) are members of the Carabid sub-family to Cicindelinae, the tiger beetles. The genus Omus is placed within the tribe Omini, and is considered the most primitive of the tiger beetles. Omus is placed in Omini with the North American genera Amblycheila and the African Platychile.The genus Omus currently contains five recognized species, Omus dejeani (Greater night-stalking tiger beetle) being the largest species of the genus, between 15 and 20 mm.
Populations of Omus are a common occurring species among terrestrial arthropods of old growth forests specifically duff habitats of the West coastal portions of North America. Field studies report two recognized species of Omus were extant in forested areas of Powell Butte Nature Park, Portland, Oregon, USA... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Olympic National Park | 🇺🇸 United States |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Greater Night-Stalking Tiger Beetle sighting in Olympic National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 113th most-seen of the 207 insects 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.
June and July
In those months about 10% of wildlife watchers report a Greater Night-Stalking Tiger Beetle in Olympic National Park on a given day, against under 5% in August to May, the lowest months. Those are among Olympic National Park's driest months, with about 60 mm of rain a month against 370 mm in November.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Greater Night-Stalking Tiger Beetle sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Olympic National Park, in our data
Olympic National Park is the only park on Wallace's Line with enough records to rate Greater Night-Stalking Tiger Beetle sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Carabidae
The closest relatives of the Greater Night-Stalking Tiger Beetle that you can see in Olympic National Park (family Carabidae, Ground Beetles) are Narrow-Collared Snail-Eating Beetle (about 20%), Western Tiger Beetle (about 10%) and Boreal Long-Lipped Tiger Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Greater Night-Stalking Tiger Beetle is recorded against all the insects logged in Olympic National Park (11 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.
