Hypopyra vespertilio
In 3 days ~10% in a week ~20%
Hypopyra vespertilio is a moth of the family Erebidae first described by Johan Christian Fabricius in 1787. It is found in China, Korea, Honshu in Japan, India (Maharashtra, Jammu and Kashmir, West Bengal), Sri Lanka, Nepal, Thailand, Myanmar, Cambodia, Vietnam, Taiwan, Malaysia, the Philippines, Java, Sumatra and Sulawesi.
The wingspan is 74–90 mm in male and 72–104 mm in female. Male has minutely fasciculate antennae. Male with an erectile tuft of long hair from femur-tibial joint of forelegs. Tibia and hind tarsi not fringed with long hair, nor the hindwings clothed with long woolly hair on ventral side. The wings are grey suffused with slight fuscous brown. The forewings have the stigma usually reduced to spots or to two spots on discocellulars. The antemedial line is excurved below the costa then oblique to the inner margin. There is a double postmedial line, angled below the costa. The postmedial line is crenulate. The hindwings are fuscous brown with antemedial oblique lines. The medial and submarginal lines are crenulate and the inner margin is crimson. The darkest form is vespertilio which has the male dark brown; the costal and outer areas of forewing suffused... Wikipedia →
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Hypopyra vespertilio sighting in Tokyo on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 644th most-seen of the 1013 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Hypopyra vespertilio in Tokyo on a given day, so our monthly data shows no clear season.
Among the best
Of the 4 cities where we can rate Hypopyra vespertilio sightings, Tokyo ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Shanghai (China, under 5%) and Hong Kong (China, under 5%).
Same family: Erebidae
The closest relatives of the Hypopyra vespertilio that you can see in Tokyo (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Japanese Nine-Spotted Moth (about 10%), Ramie Moth (about 10%) and Brown-Striped Semilooper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hypopyra vespertilio is recorded against all the insects logged in Tokyo (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.
