Agriosphodrus dohrni
In 3 days ~30% in a week ~50%
Agriosphodrus is a genus with a sole species, A. dohrni, the Japanese assassin bug. It is a species of insect in the family Reduviidae, found in China, Southeast Asia, India and Japan. It lives in trunks of various trees near human habitation, like parks and roadsides, mostly found on poplar, willow and tree of heavens. Despite its common name, the species is not native to Japan, where it was first recorded in 1930 and is considered invasive.
Agriosphodrus is a monotypic genus of assassin bugs in the subfamily Harpactorinae. A second species formerly assigned to Agriosphodrus, A. perelegans, found in Vietnam, was moved to the genus Cosmosycanus in 2004. This large assassin bug can reach body lengths of up to 25 mm (99 in) in females and up to 20 (0.81 in) in males. It features a glossy black body with white wax spots along their sides. They are covered in long, upright hairs, accendet by pale to dark yellow spots along its head and the edge of its flared abdomen. Females display a red tip at the end of thei abdomen, while males have a red patch on their lower belly.
The life cycle of Agriosphodrus dohrni... 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 Japanese Assassin Bug sighting in Osaka on a given day, based on 41 verified sightings from GBIF citizen-science data. It is the 69th most-seen of the 352 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Japanese Assassin Bug in Osaka on a given day, against under 5% in December, the lowest month.
7th of 7
Of the 7 cities where we can rate Japanese Assassin Bug sightings, Osaka ranks 7th at about 10%. The best odds are in Xi'an (China, about 20%), Nagoya (Japan, about 20%) and Sendai (Japan, about 20%).
Same family: Reduviidae
The closest relatives of the Japanese Assassin Bug that you can see in Osaka (family Reduviidae, Assassin Bugs) are Sphedanolestes impressicollis (about 10%), Ectrychotes andreae (about 10%) and Serendiba staliana (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Japanese Assassin Bug is recorded against all the insects logged in Osaka (41 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.
