Trachymela sloanei
In 3 days ~20% in a week ~30%
Trachymela sloanei, known generally as the Australian tortoise beetle or small eucalyptus tortoise beetle, is a species of leaf beetle in the family Chrysomelidae. The species is native to Australia, where it lives on Eucalyptus trees. It is an invasive pest in California, and was recently established in Shenzhen (China), Chile, Spain, Portugal and Greece. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Toluca | 🇲🇽 México | |
| 2 | Mexico City | 🇲🇽 México | |
| 3 | Madrid | 🇪🇸 Spain | |
| 4 | San Francisco | 🇺🇸 United States | |
| 5 | Auckland | 🇳🇿 New Zealand | |
| 6 | Los Angeles | 🇺🇸 United States | |
| 7 | Hong Kong | 🇨🇳 China | |
| 8 | Lisbon | 🇵🇹 Portugal | |
| 9 | Sacramento | 🇺🇸 United States | |
| 10 | San Diego | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an Australian Tortoise Beetle sighting in San Francisco on a given day, based on 245 verified sightings from GBIF citizen-science data. It is the 81st most-seen of the 737 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.
March to September
In those months about 10% of wildlife watchers report an Australian Tortoise Beetle in San Francisco on a given day, against under 5% in October to February, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Australian Tortoise Beetle sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Among the best
Of the 10 cities where we can rate Australian Tortoise Beetle sightings, San Francisco ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Toluca (México, about 10%), Mexico City (México, about 10%) and Madrid (Spain, about 10%).
Same family: Chrysomelidae
The closest relatives of the Australian Tortoise Beetle that you can see in San Francisco (family Chrysomelidae, Leaf Beetles) are Spotted Cucumber Beetle (about 10%) and Bronze Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Australian Tortoise Beetle is recorded against all the insects logged in San Francisco (245 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.
