Lucilia sericata
In 3 days ~10% in a week ~30%
The common green bottle fly or common European green bottle fly (Lucilia sericata) is a blowfly found in most areas of the world and is the most well-known of the numerous green bottle fly species. Its body is 10–14 mm (0.39–0.55 in) in length – slightly larger than a house fly – and has brilliant, metallic, blue-green or golden coloration with black markings. It has short, sparse, black bristles (setae) and three cross-grooves on the thorax. The wings are clear with light brown veins, and the legs and antennae are black. The larvae of the fly may be used for maggot therapy, are commonly used in forensic entomology, and can be the cause of myiasis in livestock and pets. The common green bottle fly emerges in the spring for mating.
The defining characteristic of L. sericata and the one most used when identifying the adult fly is the presence of three bristles on the dorsal mesothorax, located on the middle of the back of the fly. L. sericata is almost identical to its conspecific, L. cuprina, and identification between them requires microscopic examination of two main distinguishing characteristics. L. sericata is blue-black, as opposed to L. cuprina, which has a metallic... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Guiyang | 🇨🇳 China | |
| 2 | Santiago | 🇨🇱 Chile | |
| 3 | Jerusalem | 🇮🇱 Israel | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | Ciudad Juárez | 🇲🇽 México | |
| 6 | Zhuhai [Macau] | 🇨🇳 China | |
| 7 | Calgary | 🇨🇦 Canada | |
| 8 | Toronto | 🇨🇦 Canada | |
| 9 | Vancouver | 🇨🇦 Canada | |
| 10 | Tel Aviv | 🇮🇱 Israel |
With luck
About 10% of wildlife watchers report a Common European Greenbottle Fly sighting in San Francisco on a given day, based on 240 verified sightings from GBIF citizen-science data. It is the 84th 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 30%, if each day is a fresh chance.
April to October
In those months about 10% of wildlife watchers report a Common European Greenbottle Fly in San Francisco on a given day, against under 5% in November to March, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Common European Greenbottle Fly sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
34th of 52
Of the 52 cities where we can rate Common European Greenbottle Fly sightings, San Francisco ranks 34th at about 10%. The best odds are in Guiyang (China, about 30%), Santiago (Chile, about 20%) and Jerusalem (Israel, about 10%).
GBIF citizen-science records
It is estimated from how often the Common European Greenbottle Fly is recorded against all the insects logged in San Francisco (240 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.
