Tillus elongatus
In 3 days ~10% in a week ~20%
Tillus elongatus is a species of beetle in the family Cleridae. It is found in the Palearctic. The “Holz” in the German common name Holzbuntkäfer indicates that these checkered beetles are found in wood. Although Tillus elongatus can reach up to a size of 1 cm long, the beetle is rarely seen by humans, as it primarily resides hidden in the wood of trees. The colouration of the males differs from that of the females.
The earliest known systematic record of the species is by Carolus Linnaeus in 1758. It is listed in the 10th edition of his Systema naturae under genus Chrysomela, number 78, as Chrysomela elongata atra, thorace rubro subvilloso (Lat."elongated black Chrysomela, red chest moderately hairy"). This explains the epithet elongata. After Fabricius established the genus Lagria, Olivier, in 1790, placed the species in the genus Tillus. Five species of this genus have been identified in Europe. Olivier reasoned solely based on anatomical features that the beetle could not belong to either the leaf beetles (Chrysomelidae) or to Lagriinae.
Tillus elongatus reaches lengths of 7 to 10 mm. The body of the male is especially long and cylindrical... Wikipedia →
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Tillus elongatus sighting in London on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 1153rd most-seen of the 1504 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Tillus elongatus in London on a given day, so our monthly data shows no clear season.
Among the best
Of the 2 cities where we can rate Tillus elongatus sightings, London ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Vienna (Austria, under 5%).
GBIF citizen-science records
It is estimated from how often the Tillus elongatus is recorded against all the insects logged in London (8 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.
