Bactrocera oleae
In 3 days ~10% in a week ~20%
The olive fruit fly (Bactrocera oleae) is a species of fruit fly which belongs to the subfamily Dacinae. It is a phytophagous species whose larvae feed on the fruit of olive trees, hence the common name. It is considered a serious pest in the cultivation of olives.
Until 1998, the fly had not been detected in the United States, and its range coincided with the range of the olive tree in the Eastern Hemisphere: northern, eastern, and southern Africa, Southern Europe, the Canary Islands, India, and western Asia. In the Western Hemisphere, it is currently restricted to California, Baja California, and Sonora. The olive fruit fly was first detected in North America infesting olive fruits on landscape trees in Los Angeles County in November 1998. It can now be found throughout the state of California.
In the final years of the 18th century, Italian scientist Giuseppe Maria Giovene (1753–1837), in his work Avviso per la distruzione dei vermi che attaccano la polpa delle olive (1792), provided some suggestions for peasants to effectively destroy the fly musca oleae, which infested the pulp of olive trees.
This species is associated with plants... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lisbon | 🇵🇹 Portugal | |
| 2 | San Francisco | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Olive Fruit Fly sighting in Lisbon on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 299th most-seen of the 441 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.
October to December
In those months about 10% of wildlife watchers report an Olive Fruit Fly in Lisbon on a given day, against under 5% in January to September, the lowest months. Those are among Lisbon's wettest months, with about 80 mm of rain a month against almost none in July.
Yes
Of the 3 cities where we can rate Olive Fruit Fly sightings, Lisbon has the highest daily chance: under 5%. Next come San Francisco (United States, under 5%) and Los Angeles (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Olive Fruit Fly is recorded against all the insects logged in Lisbon (12 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.
