Chrysolina herbacea
In 3 days ~10% in a week ~30%
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 Porto on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 342nd most-seen of the 498 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May, August and November–December
In those months about 10% of wildlife watchers report a Mint Leaf Beetle in Porto on a given day, against under 5% in January–April, June–July and September–October, 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.
2nd of 5
Of the 5 cities where we can rate Mint Leaf Beetle sightings, Porto ranks 2nd at under 5%. The best odds are in Turin (Italy, about 10%).
Same genus: Chrysolina
The closest relatives of the Mint Leaf Beetle that you can see in Porto (genus Chrysolina) are Bronze Beetle (about 10%) and Rosemary Beetle (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 Porto (10 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.
