Phytomyza chaerophylli
In 3 days ~10% in a week ~20%
Phytomyza chaerophylli is a species of leaf mining fly in the family Agromyzidae which is found in Europe. The larvae make a short upper-surface gallery following a leaf margin which widens, so that within the confined limits of some umbelliferous leaves often forms a secondary blotch. The frass is in two untidy rows of isolated grains. Larvae leave the leaf through a semi-circular slit in the lower epidermis to pupate in the soil. Plant species which the fly larvae feed on include Sison amomum.
Mines and larvae can be found throughout the winter, the first generation from April to July although larvae can be found feeding through most of the year. Widespread and common throughout much of Europe. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Phytomyza chaerophylli sighting in London on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 971st most-seen of the 1504 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 to February
In those months about 10% of wildlife watchers report a Phytomyza chaerophylli in London on a given day, against under 5% in March to November, the lowest months.
Only London, in our data
London is the only city on Wallace's Line with enough records to rate Phytomyza chaerophylli sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Phytomyza chaerophylli is recorded against all the insects logged in London (12 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.
