Eulecanium cerasorum
In 3 days ~10%
Eulecanium cerasorum, the calico scale, is a species of scale insect. It can be identified by its white and brown color on its outer circular shell which will continuously darken over age. It is approximately one quarter of an inch in diameter. The Calico Scale is a pest to many trees in the United States, including dogwoods, honey locust, magnolias, maples, sweetgums and fruit trees. This pest typically attacks the branches which stresses the trees. Mature females produce honeydew, which promotes the growth of mold around the tree.
The nymph migrates along a tree branch, then settles down and creates a circular hardened shell or cap to be its protective coat against predators and pesticides. The typical female is known to lay around 4500 eggs inside its cap. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Philadelphia | 🇺🇸 United States | |
| 2 | New York City | 🇺🇸 United States | |
| 3 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Calico Scale sighting in New York City on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 1034th most-seen of the 1623 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Calico Scale in New York City on a given day, so our monthly data shows no clear season.
Among the best
Of the 3 cities where we can rate Calico Scale sightings, New York City ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Philadelphia (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Calico Scale is recorded against all the insects logged in New York City (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.
