Cassida nebulosa
In 3 days ~20% in a week ~30%
Cassida nebulosa is a tortoise beetle, a species of leaf beetle (family Chrysomelidae), belonging to the subfamily Cassidinae. It feeds on several plants of the family Chenopodiaceae; particularly on beet Beta vulgaris, on Chenopodium album, on C. glaucum and on Atriplex hortensis.
It is widely distributed in most of Europe, Russia, East Asia including China, Korea and Japan. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Cassida nebulosa sighting in Vienna on a given day, based on 57 verified sightings from GBIF citizen-science data. It is the 285th most-seen of the 1406 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
March to May
In those months about 10% of wildlife watchers report a Cassida nebulosa in Vienna on a given day, against under 5% in June to February, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Cassida nebulosa 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 4 cities where we can rate Cassida nebulosa sightings, Vienna ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Berlin (Germany, about 10%).
GBIF citizen-science records
It is estimated from how often the Cassida nebulosa is recorded against all the insects logged in Vienna (57 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.
