Saissetia coffeae
In 3 days ~20% in a week ~30%
Saissetia coffeae, known generally as hemispherical scale, is a species of soft scale insect in the family Coccidae. Other common names include the helmet scale and coffee brown scale. The adult scale varies in diameter from about 2 mm (0.08 in) to 4.5 mm (0.18 in), largely depending on the identity of the host plant. It is smooth, shiny and brown and closely adpressed to a stem or leaf, resembling a miniature military helmet. Young scales often have a slightly ridged surface, sometimes in the form of a "H". Like other scale insects, the hemispherical scale has no limbs and is immobile, piercing the plant tissues with its mouthparts and feeding on sap.
Saissetia coffeae is present in West, Central and East Africa, Madagascar, tropical and subtropical Asia, North, Central and South America and the Caribbean region. All hemispherical scale insects are female, and breeding occurs by parthenogenesis. The eggs are pinkish-beige, oblong and about 0.7 mm (0.03 in) long. Up to a thousand eggs are laid, and they remain concealed under the scale husk, the parent dying soon after they are laid. The eggs hatch into first instars known as "crawlers... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lima | 🇵🇪 Peru | |
| 2 | Auckland | 🇳🇿 New Zealand | |
| 3 | Buenos Aires | 🇦🇷 Argentina | |
| 4 | Taipei | 🇹🇼 Taiwan | |
| 5 | São Paulo | 🇧🇷 Brazil | |
| 6 | Miami | 🇺🇸 United States | |
| 7 | Singapore | 🇸🇬 Singapore | |
| 8 | San Francisco | 🇺🇸 United States | |
| 9 | San Diego | 🇺🇸 United States | |
| 10 | Los Angeles | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Hemispherical Scale sighting in Lima on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 62nd most-seen of the 95 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
February, April–July and October–December
In those months about 10% of wildlife watchers report a Hemispherical Scale in Lima on a given day, against under 5% in January, March and August–September, the lowest months.
Yes
Of the 10 cities where we can rate Hemispherical Scale sightings, Lima has the highest daily chance: about 10%. Next come Auckland (New Zealand, under 5%) and Buenos Aires (Argentina, under 5%).
GBIF citizen-science records
It is estimated from how often the Hemispherical Scale is recorded against all the insects logged in Lima (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.
