Euthalia phemius
In 3 days ~30% in a week ~60%
Euthalia phemius, the white-edged blue baron, is a species of butterfly of the family Nymphalidae. It is found in Sikkim, Assam, Myanmar, and southern China (S.Yunnan, including Hong Kong, Peninsular Malaya and Indo-China.
The wingspan of the moths is 60 to 85 millimeters. The species is characterized by marked sexual dimorphism. Both sexes share a brownish base colour on the upper sides of the wings. In males, a radiating whitish line pattern stands out in the postdiscal region of the forewings, as well as a light blue region above the inner margin of the hindwings, which is edged in white. In English, the species is therefore called the White-edged Blue Baron The anal angle is pointed. Females differ by a white band running from the middle of the leading edge of the forewings to the inner angle, and by the absence of the blue region on the hindwings. The undersides of the wings of both sexes are ochre to reddish-brown and replicate the white markings of the forewings.
Mature caterpillars are green. It resembles a twig of the foodplant. Spiky outgrowths extend laterally from each body segment. The dorsal line is yellow. Euthalia phemius primarily inhabits moist deciduous forests.They fly throughout the year, but are most active in June and July. They like to feed on damp soil to obtain moisture and minerals. The caterpillars feed on the leaves of the lychee tree (Litchi chinensis ) or mango ( Mangifera indica ). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Namdapha National Park | 🇮🇳 India |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nanning | 🇨🇳 China | |
| 2 | Tuen Mun | 🇨🇳 China | |
| 3 | Xiamen City | 🇨🇳 China | |
| 4 | Taichung | 🇹🇼 Taiwan | |
| 5 | Taipei | 🇹🇼 Taiwan | |
| 6 | Hong Kong | 🇨🇳 China | |
| 7 | Guangzhou | 🇨🇳 China | |
| 8 | Zhuhai [Macau] | 🇨🇳 China |
With luck
About 10% of wildlife watchers report a White-Edged Blue Baron sighting in Hong Kong on a given day, based on 123 verified sightings from GBIF citizen-science data. It is the 94th most-seen of the 1125 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
November and December
In those months about 20% of wildlife watchers report a White-Edged Blue Baron in Hong Kong on a given day, against under 5% in February, the lowest month. Those are among Hong Kong's driest months, with about 30 mm of rain a month against 280 mm in June.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most White-Edged Blue Baron sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
6th of 8
Of the 8 cities where we can rate White-Edged Blue Baron sightings, Hong Kong ranks 6th at about 10%. The best odds are in Nanning (China, about 20%), Tuen Mun (China, about 20%) and Xiamen City (China, about 10%).
GBIF citizen-science records
It is estimated from how often the White-Edged Blue Baron is recorded against all the insects logged in Hong Kong (123 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.
