Sesamia nonagrioides
In 3 days ~10% in a week ~30%
Sesamia nonagrioides, the Mediterranean corn borer, pink stalk borer or West African pink borer, is a moth of the family Noctuidae. It was described by Alexandre Louis Lefèbvre de Cérisy in 1827. It is found in Spain, southern France, Italy and on the Balkan Peninsula, as well as in north-western, south-western and western Africa.
The wingspan is 30–40 mm. The larvae feed on Phragmites communis and Arundo donax and probably also other grasses with thick stems. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Porto | 🇵🇹 Portugal |
Rare
Under 5% of wildlife watchers report a Corn Stalk Borer sighting in Porto on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 272nd 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 to September
In those months about 10% of wildlife watchers report a Corn Stalk Borer in Porto on a given day, against under 5% in October to April, the lowest months. Those are among Porto's driest months, with about 35 mm of rain a month against 140 mm in January.
Only Porto, in our data
Porto is the only city on Wallace's Line with enough records to rate Corn Stalk Borer sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Noctuidae
The closest relatives of the Corn Stalk Borer that you can see in Porto (family Noctuidae, Cutworm Moths and Allies) are Variegated Cutworm Moth (about 20%), Armyworm Moth (about 20%) and Scarce Merveille Du Jour (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Corn Stalk Borer is recorded against all the insects logged in Porto (17 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.
