Achaea janata
In 3 days ~10% in a week ~30%
Achaea janata, the castor semi-looper or croton caterpillar, is an erebid moth, the caterpillars of which are termed 'semi-loopers' due to their mode of locomotion. It is found from the Indo-Australian tropics and subtropics, extending south to New Zealand and east through the Pacific archipelagoes to Easter Island. It is a major pest of castor throughout the world.
Its wingspan is about 60–70 mm. The species has a pale reddish-brown body. Forewings with prominent markings. A short sub-basal waved line and an obliquely waved antemedial and excised postmedial lines are present. Postmedial lines are often black suffused inside them. A speck is found at the end of the cell. A diffuse rufous band runs beyond the postmedial line, Hindwings black with medial white band. Three large white spots can be seen on outer margin, with whitish cilia. Ventral side grey suffused. Forewings with an oblique white postmedial band not reaching the costa. Two crenulate medial lines found on each wing.
Eggs are small, spherical with a greenish color. Pupa is whitish green. Larva bluish grey speckled with blue black. Head black striped. Lateral and sub-lateral yellowish bands with intervening... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Daintree National Park | 🇦🇺 Australia | |
| 2 | Springbrook National Park | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Castor Semi-Looper sighting in Tuen Mun on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 492nd most-seen of the 557 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–July, October and December
In those months about 10% of wildlife watchers report a Castor Semi-Looper in Tuen Mun on a given day, against under 5% in January–April, August–September and November, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Castor Semi-Looper sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
14th of 17
Of the 17 cities where we can rate Castor Semi-Looper sightings, Tuen Mun ranks 14th at under 5%. The best odds are in Jamshedpur (India, about 30%), Bengaluru (India, about 20%) and Brisbane (Australia, about 10%).
GBIF citizen-science records
It is estimated from how often the Castor Semi-Looper is recorded against all the insects logged in Tuen Mun (5 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.
