Malacosoma castrensis
In 3 days ~20% in a week ~40%
Malacosoma castrense (or Malacosoma castrensis in the original spelling), the ground lackey, is a moth of the family Lasiocampidae. It is a tent caterpillar found in Europe. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. The moth's habitats are salt marshes and estuaries. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany | |
| 3 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Moscow | 🇷🇺 Russia |
With luck
About 10% of wildlife watchers report a Ground Lackey sighting in Wadden Sea National Park on a given day, based on 33 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 191st most-seen of the 818 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 to August
In those months about 10% of wildlife watchers report a Ground Lackey in Wadden Sea National Park on a given day, against under 5% in September to April, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Ground Lackey sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 3 parks where we can rate Ground Lackey sightings, Wadden Sea National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Cévennes National Park (France, about 10%).
GBIF citizen-science records
It is estimated from how often the Ground Lackey is recorded against all the insects logged in Wadden Sea National Park (33 verified sightings from 2019 to 2026), 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.
