Tholera cespitis
In 3 days ~10% in a week ~20%
Tholera cespitis, the hedge rustic, is a moth of the family Noctuidae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775. It is found through the Palearctic from Europe to the Altai Mountains of Siberia.
The wingspan is 34–40 mm. The forewings are dark earth brown (though appearing iridescent purplish blue under some light conditions); lines indistinct; inner and outer black with paler edges; submarginal pale, with black wedge-shaped spots before it; claviform stigma obscure, black-edged; orbicular roundish, brown with pale ring; reniform large with paler outline, especially externally; hindwing whitish, the veins dark; termen diffusely brownish; in male white, with termen narrowly grey; — ab. ferruginea Hofm. (Carinthia and the Tyrol) is much paler with a reddish-yellow tint.
There is one generation per year with adults on wing from the end of July to September. Larva shining dark brown; thoracic and anal plates black; head brown; dorsal and subdorsal lines narrow, pale yellow; lateral stripe broader; spiracles black. The larvae feed on various grasses, including Nardus stricta, Calamagrostis purpurea... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Hedge Rustic sighting in Prague on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 543rd most-seen of the 724 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.
September
In that month about 10% of wildlife watchers report a Hedge Rustic in Prague on a given day, against under 5% in October to August, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Hedge Rustic sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 2 cities where we can rate Hedge Rustic sightings, Prague ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Helsinki (Finland, under 5%).
GBIF citizen-science records
It is estimated from how often the Hedge Rustic is recorded against all the insects logged in Prague (7 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.
