Sepedon sphegea
In 3 days ~10% in a week ~30%
Sepedon sphegea is a Palearctic species of fly in the family Sciomyzidae, the marsh flies or snail-killing flies. The larva feeds on aquatic snails and as an opportunist on other invertebrates. The habitat of this species includes among many others, pond margins and damp meadows. It has a particular fondness for Iris pseudacorus which grow at the edges of the pond. Adults can be found all year long but the main flight period is from March to October. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Blue Long-Horned Snailkiller sighting in Chennai on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 298th most-seen of the 376 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.
June, August and December
In those months about 10% of wildlife watchers report a Blue Long-Horned Snailkiller in Chennai on a given day, against under 5% in January–May, July and September–November, the lowest months.
Yes
Of the 3 cities where we can rate Blue Long-Horned Snailkiller sightings, Chennai has the highest daily chance: under 5%. Next come Paris (France, under 5%) and London (United Kingdom, under 5%).
Same order: Diptera
The closest relatives of the Blue Long-Horned Snailkiller that you can see in Chennai (order Diptera, Flies) are Black Soldier Fly (about 20%), Bathroom Moth Fly (about 10%) and Chrysosoma leucopogon (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Blue Long-Horned Snailkiller is recorded against all the insects logged in Chennai (7 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.
