Agrotis trux
In 3 days ~20% in a week ~30%
Agrotis trux, the crescent dart, is a moth of the family Noctuidae. The species was first described by Jacob Hübner in 1824. It has a circum-Mediterranean distribution and is found along the coasts of France, Ireland, England, southern Europe, Algeria, Syria, Iraq, Iran, southern Russia and the Arabian Peninsula. In Africa, it is found as far south as South Africa.
The wingspan is 35–42 mm. Forewing ochreous grey, dappled and striated, and often, especially in the females, suffused with dark fuscous; claviform stigma black-edged; reniform large, filled in with black; orbicular small, round, with a pale ring; fringe rufous; hindwing dull whitish, with fuscous terminal suffusion, broader in female; or with a curved row of dark dashes on veins and no suffusion; a variable species, occurring throughout southern Europe, in Algeria, the Canaries, southern Russia and Asia Minor; — in ab. olivina Stgr. the forewing is smooth olive grey, with no or little irroration (sprinkling), the markings concisely red brown: - ab. terranea Frr. has the suffusion and markings rufous; — ab. amasina Stgr. is fuscous grey, with blackish median shade, the ground colour darker in the female... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 3 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Crescent Dart sighting in Porto on a given day, based on 32 verified sightings from GBIF citizen-science data. It is the 242nd most-seen of the 498 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
October
In that month about 20% of wildlife watchers report a Crescent Dart in Porto on a given day, against under 5% in November to July, the lowest months. That is one of Porto's wettest months, with about 140 mm of rain against 15 mm in July.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Crescent Dart sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Yes
Of the 2 cities where we can rate Crescent Dart sightings, Porto has the highest daily chance: about 10%. Next come Madrid (Spain, under 5%).
Same genus: Agrotis
The closest relatives of the Crescent Dart that you can see in Porto (genus Agrotis) are Turnip Moth (about 10%), Ipsilon Dart Moth (about 10%) and Heart And Dart (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Crescent Dart is recorded against all the insects logged in Porto (32 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.
