Therea petiveriana
In 3 days ~70% in a week ~90%
Therea petiveriana, variously called the desert cockroach, seven-spotted cockroach, domino cockroach, or Indian domino cockroach, is a species of crepuscular cockroach found in southern India. They are members of a basal group within the cockroaches. This somewhat roundish and contrastingly marked cockroach is mainly found on the ground in scrub forest habitats where they may burrow under leaf litter or loose soil during the heat of the day.
The black and white pattern of adults is believed to have evolved to mimic the pattern of the aggressive ground beetle Anthia sexguttata that has strong defenses, including the ability to spray chemical irritants. The upperside of the abdomen is orange-yellow, but is hidden by the tegmina. The spots on the asymmetrical tegmina are placed so that when closed, the spots appear symmetrical. The right tegmen lobe is bright orange-yellow. The species has been said to be one of the few cockroaches with "grace and beauty". The head is bent back underneath the pronotal shield (hypognathous) and the ocelli (simple eyes) face forward, helping sense light and thereby time, and they forage actively during early morning and late evening.... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chennai | 🇮🇳 India | |
| 2 | Coimbatore | 🇮🇳 India | |
| 3 | Hyderabad | 🇮🇳 India |
Possible
About 30% of wildlife watchers report an Indian Domino Cockroach sighting in Chennai on a given day, based on 234 verified sightings from GBIF citizen-science data. It is the 7th most-seen of the 376 insects we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
August
In that month about 50% of wildlife watchers report an Indian Domino Cockroach in Chennai on a given day, against under 5% in March and April, the lowest months.
Yes
Of the 3 cities where we can rate Indian Domino Cockroach sightings, Chennai has the highest daily chance: about 30%. Next come Coimbatore (India, about 20%) and Hyderabad (India, about 10%).
Same order: Blattodea
The closest relatives of the Indian Domino Cockroach that you can see in Chennai (order Blattodea, Cockroaches and Termites) are Brown-Banded Cockroach (about 10%) and American Cockroach (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Indian Domino Cockroach is recorded against all the insects logged in Chennai (234 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.
