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 Portland on a given day, based on 34 verified sightings from GBIF citizen-science data. It is the 160th most-seen of the 507 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.
April to June
In those months about 10% of wildlife watchers report a Greater Night-Stalking Tiger Beetle in Portland on a given day, against under 5% in July to March, the lowest months.
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.
Yes
Of the 3 cities where we can rate Greater Night-Stalking Tiger Beetle sightings, Portland has the highest daily chance: under 5%. Next come Seattle (United States, under 5%) and Vancouver (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Greater Night-Stalking Tiger Beetle is recorded against all the insects logged in Portland (34 verified sightings), 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.
