Xylosandrus crassiusculus
In 3 days ~10% in a week ~30%
Xylosandrus crassiusculus, known generally as the Asian ambrosia beetle or granulate ambrosia beetle, is a species of tropical bark beetle in the family Curculionidae. It is native to Asia and has spread to Africa, Europe, Australasia and the Americas. The adult beetle is reddish-brown and some 2 to 3 mm (0.08 to 0.12 in) long.
This beetle is native to Asia, and has spread to other parts of the world as an invasive species in Africa, the Americas, Europe and Oceania. It was first reported in the southeastern United States in 1974, had reached Costa Rica by 1996, Panama by 2003, and Guatemala and northern Brazil by 2008. It appeared in Argentina in 2001, nearly a decade before it was detected in southern Brazil and Uruguay; as the latter two countries were vigilant, with long-term trapping programmes, the Argentine collection may represent a direct introduction from a non-American source, with the insects later spreading northwards up the coast.
Females mate with their siblings before leaving the galleries. Although males are flightless, females can fly and disperse to other potential host trees. Here they excavate tunnels and lay eggs... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Auckland | 🇳🇿 New Zealand |
Rare
Under 5% of wildlife watchers report a Granulate Ambrosia Beetle sighting in Auckland on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 395th most-seen of the 689 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.
January and March
In those months about 10% of wildlife watchers report a Granulate Ambrosia Beetle in Auckland on a given day, against under 5% in February and April–December, the lowest months.
Only Auckland, in our data
Auckland is the only city on Wallace's Line with enough records to rate Granulate Ambrosia Beetle sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Curculionidae
The closest relatives of the Granulate Ambrosia Beetle that you can see in Auckland (family Curculionidae, True Weevils) are Fuller's Rose Weevil (about 10%), White-Fringed Weevil (about 10%) and Cleonus confessus (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Granulate Ambrosia Beetle is recorded against all the insects logged in Auckland (11 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.
