Cynomya cadaverina
In 3 days ~10% in a week ~20%
Cynomya cadaverina, also known as the shiny blue bottle fly, is a member of the family Calliphoridae, which includes blow flies as well as bottle flies. In recent years, this family has become a forensically important facet in many medicocriminal investigations in the growing field of forensic entomology. C. cadaverina is specifically important in determining a post-mortem interval, as well as other important factors.
Cynomya cadaverina was first described in 1830 by the French entomologist Jean-Baptiste Robineau-Desvoidy. Its epithet cadaverina is derived from the Latin word, meaning ‘(that feed on) dead bodies.’ This species is a member of the order Diptera and the diverse family Calliphoridae.
C. cadaverina is a fairly large species, ranging anywhere from 9-14 millimeters long. and has many characteristics that are common to its family, Calliphoridae. These characteristics include their metallic color, having bristles on their meron as well as having plumose arista. This species is known for having a shiny metallic blue abdomen for which it is named. It has a dark blue or black thorax and distinctive darker blue stripes present on the dorsum behind... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Edmonton | 🇨🇦 Canada | |
| 2 | Boston | 🇺🇸 United States | |
| 3 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 4 | Dallas | 🇺🇸 United States | |
| 5 | Austin | 🇺🇸 United States | |
| 6 | Philadelphia | 🇺🇸 United States | |
| 7 | Vancouver | 🇨🇦 Canada | |
| 8 | Toronto | 🇨🇦 Canada | |
| 9 | New York City | 🇺🇸 United States | |
| 10 | Montreal | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Shiny Blue Bottle Fly sighting in Philadelphia on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 557th most-seen of the 632 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.
December
In that month about 10% of wildlife watchers report a Shiny Blue Bottle Fly in Philadelphia on a given day, against under 5% in January to November, the lowest months.
Among the best
Of the 12 cities where we can rate Shiny Blue Bottle Fly sightings, Philadelphia ranks 6th at under 5%, level with the leaders once rounded. The best odds are in Edmonton (Canada, under 5%), Boston (United States, under 5%) and Minneapolis [Saint Paul] (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Shiny Blue Bottle Fly is recorded against all the insects logged in Philadelphia (5 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.
