Chrysolina herbacea
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Mint Leaf Beetle sighting in Milan on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 289th most-seen of the 351 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.
June and November
In those months about 10% of wildlife watchers report a Mint Leaf Beetle in Milan on a given day, against under 5% in July–October and December–May, 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.
3rd of 5
Of the 5 cities where we can rate Mint Leaf Beetle sightings, Milan ranks 3rd at under 5%. The best odds are in Turin (Italy, about 10%) and Porto (Portugal, under 5%).
Same genus: Chrysolina
The closest relatives of the Mint Leaf Beetle that you can see in Milan (genus Chrysolina) are Rosemary Beetle (about 10%) and Chrysolina rossia (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mint Leaf Beetle is recorded against all the insects logged in Milan (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.
