Phosphaenus hemipterus
In 3 days ~20% in a week ~40%
Phosphaenus hemipterus, the short-winged firefly or lesser glow worm, is a beetle in the monotypic genus Phosphaenus and the family Lampyridae. It is found in the Mediterranean, in Central Europe, west to the Atlantic Ocean and north to the edge of Scandinavia and in England. In North America, the species has been introduced. It inhabits meadows, floodplains, forest edges, and dry slopes, but also parks and gardens. In Britain, this species is fairly rare compared to the common glow-worm (Lampyris noctiluca). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Lesser Black Glow-Worm sighting in Porto on a given day, based on 50 verified sightings from GBIF citizen-science data. It is the 158th most-seen of the 498 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.
May
In that month about 20% of wildlife watchers report a Lesser Black Glow-Worm in Porto on a given day, against under 5% in April and July–January, the lowest months.
Yes
Of the 4 cities where we can rate Lesser Black Glow-Worm sightings, Porto has the highest daily chance: about 10%. Next come Essen (Germany, about 10%) and Helsinki (Finland, under 5%).
GBIF citizen-science records
It is estimated from how often the Lesser Black Glow-Worm is recorded against all the insects logged in Porto (50 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.
