Aonidiella aurantii
In 3 days ~10% in a week ~30%
Aonidiella aurantii or red scale is an armored scale insect and a major pest of citrus. It is thought to be a native of South China but has been widely dispersed by the agency of man through the movement of infected plant material. In the United States it is known as California red scale. It was first found in California between 1868 and 1875, apparently brought there on planting material imported from Australia.
The female scale insect has a circular, brownish-red cover about 1.8 millimetres in diameter. It is firmly attached to the surface when the female is moulting or reproducing. The insect itself is visible through the cover and has an oval body which becomes kidney-shaped at the last instar stage. The female molts twice, exuding the material from which the cover is formed and developing a concentric ring in the center each time. There is a characteristic whitish coating on the underside of the body which separates it from the host plant. The female is viviparous with the eggs hatching internally. She produces 100 to 150 young altogether and live nymphs or crawlers emerge from under their mother's cover at the rate of two to three per day. When they first hatch... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Auckland | 🇳🇿 New Zealand | |
| 2 | Los Angeles | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a California Red Scale 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.
July and September
In those months about 10% of wildlife watchers report a California Red Scale in Auckland on a given day, against under 5% in August and October–June, the lowest months.
Yes
Of the 2 cities where we can rate California Red Scale sightings, Auckland has the highest daily chance: under 5%. Next come Los Angeles (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the California Red Scale 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.
