Cochliomyia macellaria
In 3 days ~20% in a week ~40%
Cochliomyia macellaria, also known as the secondary screwworm, is a species of blow fly in the family Calliphoridae. These screwworms are referred to as "secondary" because they typically infest wounds after invasion by primary myiasis-causing flies. While blow flies may be found in every terrestrial habitat, C. macellaria is primarily found in the United States, American tropics, and sometimes southern Canada. They are most common in the southeastern United States in states like Florida. C. macellaria have a metallic greenish-blue thorax and a red-orange head and eyes. These adult blowflies range from 5–8 mm in size.
Since the fly larvae infect the wounds and dead tissue of animals, these flies pose a grave medical and economic risk to humans and livestock. C. macellaria are attracted to carrion and garbage and are often found in slaughterhouses and outdoor markets in the tropics. While these flies carry many various types of Salmonella and viruses like the swine influenza, C. macellaria can also serve as important decomposers in our ecosystem.
Cochliomyia macellaria are classified as intermediate sized flies with a dull or bright metallic, blue-green coloration... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lima | 🇵🇪 Peru | |
| 2 | Baltimore | 🇺🇸 United States | |
| 3 | Phoenix | 🇺🇸 United States | |
| 4 | Austin | 🇺🇸 United States | |
| 5 | Washington | 🇺🇸 United States | |
| 6 | New York City | 🇺🇸 United States | |
| 7 | Dallas | 🇺🇸 United States | |
| 8 | Chicago | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Secondary Screwworm Fly sighting in Lima on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 37th most-seen of the 95 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
January, March–May, July–September and November
In those months about 10% of wildlife watchers report a Secondary Screwworm Fly in Lima on a given day, against under 5% in February, June, October and December, the lowest months.
Yes
Of the 8 cities where we can rate Secondary Screwworm Fly sightings, Lima has the highest daily chance: about 10%. Next come Baltimore (United States, under 5%) and Phoenix (United States, under 5%).
Same family: Calliphoridae
The closest relatives of the Secondary Screwworm Fly that you can see in Lima (family Calliphoridae, Blow Flies) are Sarconesia chlorogaster (about 10%) and Common European Greenbottle Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Secondary Screwworm Fly is recorded against all the insects logged in Lima (16 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.
