Fannia canicularis
In 3 days ~10%
The lesser house fly (Fannia canicularis), commonly known as little house fly, is a species of fly. It is somewhat smaller (3.5–6 mm (0.14–0.24 in)) than the common housefly and is best known for its habit of entering buildings and flying in jagged patterns in the middle of a room. It is slender, and the median vein in the wing is straight. Larvae feed on all manner of decaying organic matter, including carrion. Though similar in appearance and habits, it is no closer in relation to a house fly than any other fly in order Diptera is.
Fannia canicularis is a slim fly reaching a length of from 4 to 6 mm. The white-bordered eyes meet above in the male, a condition described as holoptic. In females, the eyes do not meet. The brown-grey thorax has three black, longitudinal stripes in the males. These are much less distinct in the female. The first two segments of the abdomen are translucently yellow with a dark-brown basal colour. The dark trapezoid marks of the males are hardly recognizable in the females. The halteres are yellowish.
The females lay their eggs in batches of up to 50 and may lay up to 2,000 eggs altogether. The eggs, which are white... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Athens | 🇬🇷 Greece | |
| 2 | Auckland | 🇳🇿 New Zealand | |
| 3 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Lesser House Fly sighting in San Francisco on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 679th most-seen of the 737 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Lesser House Fly in San Francisco on a given day, so our monthly data shows no clear season.
3rd of 3
Of the 3 cities where we can rate Lesser House Fly sightings, San Francisco ranks 3rd at under 5%. The best odds are in Athens (Greece, about 10%) and Auckland (New Zealand, under 5%).
Same order: Diptera
The closest relatives of the Lesser House Fly that you can see in San Francisco (order Diptera, Flies) are Oblique Streaktail (about 10%), Eurasian Drone Fly (about 10%) and Coyote Brush Bud Gall Midge (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Lesser House Fly is recorded against all the insects logged in San Francisco (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.
