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Sphenophorus interstitialis
In 3 days ~10% in a week ~20%
Sphenophorus parvulus, commonly known as the bluegrass billbug, is a species of beetle in the true weevil family Curculionidae. It is found in North America, especially in the eastern United States. It is a pest of Kentucky bluegrass, corn and grain crops.
Swedish entomologist Leonard Gyllenhaal described the organism in 1838. The species name is derived from the Latin adjective parvus "small". The adult bluegrass billbug is about 0.25 in (0.6 cm) in length, a third of which is the long, downward-curving snout or proboscis. The thorax bears deep puncture marks and the elytra have longitudinal grooves. These billbugs are usually some shade of brown, grey or black.
The bluegrass billbug is native to North America. Its range extends from Ontario and Nova Scotia southwards to Idaho, New Mexico and Florida. It is commonest in the east of its range. It is found in grassland, including lawns, especially in association with Kentucky bluegrass, as well as in corn and other grain crops.
The adult beetle feeds on seedlings and tender young shoots of various grasses. It seldom flies, preferring to scramble among the crop... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salt Lake City | 🇺🇸 United States | |
| 2 | Denver | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 5 | Montreal | 🇨🇦 Canada | |
| 6 | Portland | 🇺🇸 United States | |
| 7 | Boston | 🇺🇸 United States | |
| 8 | Chicago | 🇺🇸 United States | |
| 9 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Sphenophorus interstitialis sighting in Portland on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 427th 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Sphenophorus interstitialis in Portland on a given day, so our monthly data shows no clear season.
6th of 9
Of the 9 cities where we can rate Sphenophorus interstitialis sightings, Portland ranks 6th at under 5%. The best odds are in Salt Lake City (United States, about 10%), Denver (United States, under 5%) and Toronto (Canada, under 5%).
Same order: Coleoptera
The closest relatives of the Sphenophorus interstitialis that you can see in Portland (order Coleoptera, Beetles) are Asian Lady Beetle (about 30%), Seven-Spotted Lady Beetle (about 20%) and Western Polished Lady Beetle (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sphenophorus interstitialis is recorded against all the insects logged in Portland (6 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.
