Plectrura spinicauda
In 3 days ~10% in a week ~20%
Plectrura spinicauda is a species of beetle in the family Cerambycidae. It was described by Victor Motschulsky in 1845. It is known from the United States and Canada. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Bear Rainforest | 🇨🇦 Canada | |
| 2 | Olympic National Park | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Thorn-Tailed Longhorn Beetle sighting in Portland on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 358th 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 20%, if each day is a fresh chance.
February and November
In those months about 10% of wildlife watchers report a Thorn-Tailed Longhorn Beetle in Portland on a given day, against under 5% in March–October and December–January, the lowest months. Those are among Portland's wettest months, with about 180 mm of rain a month against 10 mm in July.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Thorn-Tailed Longhorn Beetle sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 cities where we can rate Thorn-Tailed Longhorn Beetle sightings, Portland ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Vancouver (Canada, under 5%).
Same family: Cerambycidae
The closest relatives of the Thorn-Tailed Longhorn Beetle that you can see in Portland (family Cerambycidae, Longhorn Beetles) are Banded Alder Borer (about 10%), Xestoleptura crassipes (about 10%) and Locust Borer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thorn-Tailed Longhorn Beetle is recorded against all the insects logged in Portland (9 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.
