Ceratitis capitata
In 3 days ~10% in a week ~20%
Ceratitis capitata, commonly known as the Mediterranean fruit fly or medfly, is a yellow-and-brown fly native to sub-Saharan Africa. It has no near relatives in the Western Hemisphere and is considered to be one of the most destructive fruit pests in the world. There have been occasional medfly infestations in California, Florida, and Texas that require extensive eradication efforts to prevent the fly from establishing itself in the United States.
C. capitata is the most economically important fruit fly species because of both its ability to survive cooler climates more successfully than most other fruit fly species and its ability to inhabit more than 200 tropical fruits and vegetables to which it causes severe destruction and degradation. The practices that are used to eradicate the medfly after its introduction into a new environment can be extremely difficult and expensive, but infestation of C. capitata lowers crop yields and induces costly sorting processes for fresh fruits and vegetables.
C. capitata eggs are characterized by their curved shape, shiny white color, and smooth features. Each egg is approximately 1 millimetre (5⁄128 in) in length... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Mediterranean Fruit Fly sighting in San Francisco on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 299th most-seen of the 737 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 Mediterranean Fruit Fly in San Francisco on a given day, so our monthly data shows no clear season.
Between 5 and 8 pm
Across all the parks we cover, that three-hour window holds the most Mediterranean Fruit Fly sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
18th of 18
Of the 18 cities where we can rate Mediterranean Fruit Fly sightings, San Francisco ranks 18th at under 5%. The best odds are in Mendoza (Argentina, about 20%), Valencia (Spain, about 10%) and Los Angeles (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Mediterranean Fruit Fly is recorded against all the insects logged in San Francisco (30 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.
