Scirpophaga incertulas
In 3 days ~20% in a week ~40%
Scirpophaga incertulas, the yellow stem borer or rice yellow stem borer, is a species of moth of the family Crambidae. It was described by Francis Walker in 1863. It is found in Afghanistan, Nepal, north-eastern India, Sri Lanka, Bangladesh, Myanmar, Vietnam, Thailand, Malaysia, Singapore, Sumatra, Java, Borneo, Sumba, Sulawesi, the Philippines, Taiwan, China and Japan.
The wingspan of the male is 18–22 mm and the female is 34 mm. Adult males are smaller than the females. Males are brownish ochreous. Forewings irrorated (sprinkled) with dark scales and with the veins slightly streaked with fuscous. A black spot found at lower angle of cell. There is an oblique fuscous line runs from apex to vein 2. A marginal black specks series can be seen. Hindwings ochreous white. Female fuscous brown with pale fuscous hindwings.
The larvae feed on Oryza sativa. It is considered as a major rice pest throughout India, Sri Lanka as well as in various parts of Nepal, and it devastates harvests annually. They bore the stem of their host plant. After hatching, early instars bore into the leaf sheath and causing longitudinal yellowish-white patches as a result... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Rice Yellow Stem Borer sighting in Chennai on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 188th 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 40%, if each day is a fresh chance.
March and May–September
In those months about 10% of wildlife watchers report a Rice Yellow Stem Borer in Chennai on a given day, against under 5% in April and October–February, the lowest months.
Among the best
Of the 4 cities where we can rate Rice Yellow Stem Borer sightings, Chennai ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Kolkata (India, about 10%) and Hyderabad (India, about 10%).
Same family: Crambidae
The closest relatives of the Rice Yellow Stem Borer that you can see in Chennai (family Crambidae, Crambid Snout Moths) are Hawaiian Beet Webworm Moth (about 20%), Mung Bean Moth (about 10%) and Rice Leaf-Roller (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rice Yellow Stem Borer is recorded against all the insects logged in Chennai (12 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.
