Pontia edusa
In 3 days ~10% in a week ~30%
Pontia edusa, the eastern Bath white, is a butterfly in the family Pieridae. Pontia edusa is a small to medium-sized migrant butterfly, with a wingspan reaching about 45 mm. The upperside of the wings is white, with black stains on the top of the forewing and hindwing. The hindwing undersides have greenish-grey spots. The butterfly is nearly identical to Pontia daplidice, making the western extent of its range difficult to ascertain. Investigations of the genitals and DNA analysis are the only way to distinguish between these two types.
The adults fly from March to October with two to four generations depending on the latitude. The eggs are laid singly and have an incubation period of seven days. The caterpillars are present from May. They are greyish-greenish, with black dots and broad yellow stripes, quite similar to the larva of the cabbage butterfly (Pieris brassicae). The larvae feed on Resedaceae species. Pontia edusa hibernates in the chrysalis stage.
It is found from the south east of Europe (southern France, Italy, Corsica, Sardinia) up to central Europe and the Middle East in Iran and Iraq. It is a migrant which can also be encountered... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hortobágy National Park | 🇭🇺 Hungary | |
| 2 | Kiskunság National Park | 🇭🇺 Hungary | |
| 3 | Fertő-Hanság National Park | 🇭🇺 Hungary |
With luck
About 10% of wildlife watchers report an Eastern Bath White sighting in Milan on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 195th most-seen of the 351 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 an Eastern Bath White in Milan on a given day, against under 5% in October to April, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Eastern Bath White sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
19th of 22
Of the 22 cities where we can rate Eastern Bath White sightings, Milan ranks 19th at about 10%. The best odds are in Ankara (Turkey, about 30%), Athens (Greece, about 20%) and Yerevan (Armenia, about 10%).
Same family: Pieridae
The closest relatives of the Eastern Bath White that you can see in Milan (family Pieridae, Whites, Yellows, and Sulphurs) are Green-Veined White (about 20%), Small White (about 20%) and Clouded Yellow (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Eastern Bath White is recorded against all the insects logged in Milan (11 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.
