Charidotella sexpunctata
In 3 days ~10% in a week ~30%
Charidotella sexpunctata, the golden tortoise beetle, is a species of beetle in the leaf beetle family, Chrysomelidae. It is native to the Americas, and very broadly distributed. Charidotella sexpunctata in North America was formerly known as Metriona bicolor. The species has also been seen in regions reaching up to Argentina.
There are two subspecies, ssp. bicolor and ssp. sexpunctata. Adult C. sexpunctata measure 5–7 millimetres (0.2–0.3 in) in length. They are variable in color from reddish-brown with black spots to brilliant, mirror-like gold, earning it the nickname "goldbug". Elytral margins are expanded and nearly transparent.
The color changes through its development, during mating, and during times of disturbance, such as when it is touched by a human researcher. Scientists have not examined the color-change mechanism in this species. However, color change in the related Panamanian Charidotella egregia (also called 'golden tortoise beetle') occurs when this beetle's elytra hydrate and dehydrate. Adults of both species can turn from shiny gold through reddish-brown when disturbed.
Female Charidotella sexpunctata lay clusters... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Buenos Aires | 🇦🇷 Argentina | |
| 3 | San José | 🇨🇷 Costa Rica | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | Detroit | 🇺🇸 United States | |
| 6 | Belo Horizonte | 🇧🇷 Brazil | |
| 7 | Washington | 🇺🇸 United States | |
| 8 | Toronto | 🇨🇦 Canada | |
| 9 | Baltimore | 🇺🇸 United States | |
| 10 | Philadelphia | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Golden Tortoise Beetle sighting in Buenos Aires on a given day, based on 63 verified sightings from GBIF citizen-science data. It is the 171st most-seen of the 558 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.
March and October–January
In those months about 10% of wildlife watchers report a Golden Tortoise Beetle in Buenos Aires on a given day, against under 5% in February and April–September, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Golden Tortoise Beetle sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 17 cities where we can rate Golden Tortoise Beetle sightings, Buenos Aires ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Boston (United States, about 10%).
Same family: Chrysomelidae
The closest relatives of the Golden Tortoise Beetle that you can see in Buenos Aires (family Chrysomelidae, Leaf Beetles) are Diabrotica speciosa (about 10%), Coraliomela quadrimaculata (about 10%) and Calligrapha polyspila (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Golden Tortoise Beetle is recorded against all the insects logged in Buenos Aires (63 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.
