Chrysolina herbacea
In 3 days ~20% in a week ~50%
Chrysolina herbacea, also known as the mint leaf beetle, or green mint beetle (in the UK), is a species of beetle in the family Chrysomelidae. The species is generally metallic bright green, with some of the mint leaf beetles having a gold-purple reflection. Variations in colour exist, with certain specimens, in particular females, ranging from golden-red to deep blue. The beetles' legs and pronotum are the same as their basic colour, and they have antennae.
Chrysolina herbacea is large and has a long, oval shape. The adult beetles can be 8–10 mm long and have black-coloured larvae, which also feed on mint leaves. The adults have complete wings, but they only seldom fly. Visually, the mint leaf beetle may be confused with the much rarer tansy beetle (Chrysolina graminis), as well as with Cryptocephalus hypochaeridis, and with Chrysolina coerulans.
The species can be found in the European islands Great Britain, and Ireland, in European countries such as Portugal, and Romania, as well as in the Caucasus, Turkey, western Central Asia, and North India. The mint leaf beetle prefers to live in damp riverside areas and marshy fields, favouring... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Triglav National Park | 🇸🇮 Slovenia | |
| 2 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Mint Leaf Beetle sighting in Triglav National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 230th most-seen of the 260 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
September
In that month about 20% of wildlife watchers report a Mint Leaf Beetle in Triglav National Park on a given day, against under 5% in October to June, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Mint Leaf Beetle sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Mint Leaf Beetle sightings, Triglav National Park has the highest daily chance: about 10%. Next come Pyrénées National Park (France, under 5%).
GBIF citizen-science records
It is estimated from how often the Mint Leaf Beetle is recorded against all the insects logged in Triglav National Park (6 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.
