Parasa lepida
In 3 days ~20% in a week ~30%
Parasa lepida, the nettle caterpillar or blue-striped nettle grub, is a moth of the family Limacodidae that was described by Pieter Cramer in 1799. It is a native minor pest found in the Indo-Malayan region, including India, Sri Lanka, Vietnam, Malaysia and Indonesia. It is an introduced pest to urban trees in western Japan.
In the male, the head is greenish, with red brown at the sides. The thorax is green with a brown stripe on the vertex. Abdomen brown. Forewings are pale green, resembling the colour of a pea plant. There is a red-brown basal patch on the costa. Outer area is reddish brown, widest at inner margin. Hindwing yellowish at base, reddish brown towards margin. Legs have pale tipped joints. In the female, the reddish-brown stripe on the thorax is much wider and nearly the whole of the hindwing is reddish brown. Larva pale green, whitish or bright yellowish green on the dorsal surface. There are three green bands throughout the body. Sub-dorsal and sub-lateral series of short spinous tubercles, the spines of the anterior and posterior tubercles tipped with red. Cocoon purple brown. Eggs are flat and overlap each other. Eggs are covered by a transparent... Wikipedia →
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Blue-Striped Nettle Grub sighting in Chennai on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 237th most-seen of the 376 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April, July–August and October–December
In those months about 10% of wildlife watchers report a Blue-Striped Nettle Grub in Chennai on a given day, against under 5% in January–March, May–June and September, the lowest months. Those are among Chennai's wettest months, with about 160 mm of rain a month against 5 mm in February.
Among the best
Of the 9 cities where we can rate Blue-Striped Nettle Grub sightings, Chennai ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Nagoya (Japan, about 10%), Mumbai (India, about 10%) and Osaka (Japan, about 10%).
Same order: Lepidoptera
The closest relatives of the Blue-Striped Nettle Grub that you can see in Chennai (order Lepidoptera, Butterflies and Moths) are Tawny Coster (about 40%), Plain Tiger Butterfly (about 40%) and Lemon Pansy (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Blue-Striped Nettle Grub is recorded against all the insects logged in Chennai (9 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.
