Galeruca tanaceti
In 3 days ~50% in a week ~80%
Galeruca tanaceti is a species of leaf beetle found in the Palearctic realm, and is the type species of the genus Galeruca. It feeds on various plants in both its adult and larval stages. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae.
This species is present in the Palearctic realm from Portugal to Japan. It is also present in the Near East and North Africa. It has been introduced to northern America. These beetles inhabit dry and sunny areas, meadows and grassy places.
Galeruca tanaceti can reach a length of 6–11 millimetres (0.24–0.43 in). These leaf beetles have a broadly ovate, convex and glabrous body. The head, pronotum and elytra are matt black and densely punctured. The lateral margins of the elytra are explanate. The legs are entirely black, relatively long and slender.
The females are longer than the males. At the time of oviposition the abdomen is greatly enlarged and filled with eggs so much that the elytra cover just one half of the length of the belly. The larvae are dark and covered with bristles on fleshy outgrowths.
Adults can be found between June and August... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mercantour National Park | 🇫🇷 France | |
| 2 | Białowieża National Park | 🇵🇱 Poland | |
| 3 | Tatra National Park | 🇸🇰 Slovakia | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Pyrénées National Park | 🇫🇷 France | |
| 6 | Cévennes National Park | 🇫🇷 France |
Possible
About 20% of wildlife watchers report a Black-Punctured Leaf Beetle sighting in Mercantour National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 101st most-seen of the 412 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
September and November–December
In those months about 40% of wildlife watchers report a Black-Punctured Leaf Beetle in Mercantour National Park on a given day, against under 5% in January to June, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Black-Punctured Leaf Beetle sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 6 parks where we can rate Black-Punctured Leaf Beetle sightings, Mercantour National Park has the highest daily chance: about 20%. Next come Białowieża National Park (Poland, about 20%) and Tatra National Park (Slovakia, about 10%).
Same family: Chrysomelidae
The closest relatives of the Black-Punctured Leaf Beetle that you can see in Mercantour National Park (family Chrysomelidae, Leaf Beetles) are Four Spotted Leaf Beetle (about 10%), Daffodil Leaf-Beetle (about 10%) and Bloody-Nosed Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black-Punctured Leaf Beetle is recorded against all the insects logged in Mercantour National Park (23 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.
