Listronotus bonariensis
In 3 days ~10% in a week ~20%
Listronotus bonariensis is a species of weevil that is native to South America and is commonly known as the Argentine stem weevil. It is a pest of grasses and cereals, with the larvae being more destructive than the adult insects. It has spread to Australia and New Zealand, where it is regarded as a pest species.
The Argentine stem weevil is a small grey insect up to 3 mm (0.12 in) long, with a waxy covering. Soil particles adhere to this wax, and while the insect remains stationary, which it often does, this makes it well-camouflaged and difficult to spot. The larvae are cream-coloured grubs with brownish heads.
The Argentine stem weevil is native to South America where it is present in Brazil, Uruguay, Argentina, Bolivia and Chile. In these countries it is not considered to be economically important. It has spread to Australia and New Zealand, in both of which countries it is regarded as a pest species. In New Zealand, it is considered to be the most important insect pest in the country, causing a total loss estimated in 1991 to be NZ$78–251 million per year.
This weevil feeds on a number of crop plants including perennial ryegrass... 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 Argentine Stem Weevil sighting in Auckland on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 618th 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
In that month about 10% of wildlife watchers report an Argentine Stem Weevil in Auckland on a given day, against under 5% in February to December, the lowest months.
Only Auckland, in our data
Auckland is the only city on Wallace's Line with enough records to rate Argentine Stem Weevil sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Curculionidae
The closest relatives of the Argentine Stem Weevil 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 Argentine Stem Weevil is recorded against all the insects logged in Auckland (5 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.
