Monostegia abdominalis
In 3 days ~10% in a week ~20%
Monostegia is a genus of sawfly. The authority is based on the description by Achille Costa and Oronzio Costa, although earlier work grants this to Fabricius 1798., though the most common species, M. abdominalis, bears the authority of Fabricius.
Adults: Head and thorax are black, with some yellow parts including mouthparts. Legs and abdomen mainly yellow, wings suffused with brown. Eggs: Smooth, white and oblong measuring 1 mm by 4 mm. Larvae: Caterpillar-like, growing from 2–4 mm to 16–21 mm. Pupae: Shorter and fatter measuring 8 mm in length, and become increasingly melanized.
Monostegia nigra Konow 1896 Distribution is holarctic, from Europe to Asia Minor and the Caucasus in the south, through to Siberia. Though it was only introduced to North America from Europe in the 1950s, where it naturalised, its range continues to expand. In 1979 its distribution in North America was from Quebec to New Jersey... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Loosestrife Sawfly sighting in London on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 1300th 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Loosestrife Sawfly in London on a given day, so our monthly data shows no clear season.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Loosestrife Sawfly sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 cities where we can rate Loosestrife Sawfly sightings, London ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Helsinki (Finland, under 5%).
Same family: Tenthredinidae
The closest relatives of the Loosestrife Sawfly that you can see in London (family Tenthredinidae, Common Sawflies) are Willow Redgall Sawfly (about 10%) and Turnip Sawfly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Loosestrife Sawfly is recorded against all the insects logged in London (6 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.
