Blattella asahinai
In 3 days ~10% in a week ~30%
Blattella asahinai, the Asian cockroach, is a species of cockroach that was first described in 1981 from insects collected on Okinawa Island, Japan. It is a small species of cockroach, typically 1.3 to 1.6 centimetres (1⁄2 to 5⁄8 in) long and tan to dark brown in colour with dark parallel stripes on the back of their heads. It is commonly mistaken for the German cockroach (B. germanica) due to their similar appearance. It is now commonly found in the United States in and around houses.
The Asian cockroach is nearly identical to the German cockroach (B. germanica) except for a few minor morphological differences. Like the German cockroach, it is about 1.6 cm (5⁄8 in) long, is tan to brown in color, and has wings. However, its wings are longer than the German cockroach, and a difference is seen in a groove in the abdomen in the two species. The quickest way to tell the difference between them is that the Asian is a strong flyer and is attracted to light, unlike the German. This species tends to prefer the outdoors, whereas the German prefers living indoors. The almost identical appearance has caused concerns and issues with the pest management industries... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pune | 🇮🇳 India | |
| 2 | Chennai | 🇮🇳 India | |
| 3 | Austin | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | San Antonio | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Asian Cockroach sighting in Chennai on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 298th most-seen of the 376 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.
April–June and August
In those months about 10% of wildlife watchers report an Asian Cockroach in Chennai on a given day, against under 5% in July and September–March, the lowest months.
Among the best
Of the 5 cities where we can rate Asian Cockroach sightings, Chennai ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Pune (India, under 5%).
GBIF citizen-science records
It is estimated from how often the Asian Cockroach is recorded against all the insects logged in Chennai (6 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.
