Graphocephala atropunctata
In 3 days ~10% in a week ~30%
Graphocephala atropunctata, commonly known as the blue-green sharpshooter, is a hemipteran bug native to the United States west coast, as well as Arizona and New Mexico. It carries the phytopathogenic bacteria Xylella fastidiosa which infects the xylem of grape vines causing die-back – known as Pierce's disease. This leads to loss of productivity and economic damage to the California vineyards. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States | |
| 2 | Grand Canyon National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Seattle | 🇺🇸 United States | |
| 2 | Vancouver | 🇨🇦 Canada | |
| 3 | Portland | 🇺🇸 United States | |
| 4 | San Francisco | 🇺🇸 United States | |
| 5 | Los Angeles | 🇺🇸 United States | |
| 6 | San Diego | 🇺🇸 United States | |
| 7 | Mexico City | 🇲🇽 México |
With luck
About 10% of wildlife watchers report a Blue-Green Sharpshooter sighting in Portland on a given day, based on 41 verified sightings from GBIF citizen-science data. It is the 139th 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.
March–May and July–August
In those months about 10% of wildlife watchers report a Blue-Green Sharpshooter in Portland on a given day, against under 5% in June and September–February, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Blue-Green Sharpshooter 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 7 cities where we can rate Blue-Green Sharpshooter sightings, Portland ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Seattle (United States, about 10%) and Vancouver (Canada, about 10%).
GBIF citizen-science records
It is estimated from how often the Blue-Green Sharpshooter is recorded against all the insects logged in Portland (41 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.
