Scolytus multistriatus
In 3 days ~10% in a week ~20%
Scolytus multistriatus, the European elm bark beetle or smaller European elm bark beetle, is a bark beetle species in the genus Scolytus. In Europe, while S. multistriatus acts as vector of the Dutch elm disease, caused by the Ascomycota Ophiostoma ulmi, it is much less effective than the large elm bark beetle, S. scolytus.
S. multistriatus uses vanillin and syringaldehyde as signals to find a host tree during oviposition. 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 an Elm Bark Beetle sighting in Auckland on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 425th 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 20%, if each day is a fresh chance.
January, March and October
In those months about 10% of wildlife watchers report an Elm Bark Beetle in Auckland on a given day, against under 5% in February, April–September and November–December, the lowest months.
Only Auckland, in our data
Auckland is the only city on Wallace's Line with enough records to rate Elm Bark Beetle sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Curculionidae
The closest relatives of the Elm Bark 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 Elm Bark Beetle is recorded against all the insects logged in Auckland (10 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.
