Systena frontalis
In 3 days ~10%
Systena frontalis, the red-headed flea beetle or cranberry flea beetle, is a species of flea beetle in the family Chrysomelidae. It is found in North America. It is named for its red colored head that contrasts its black body. Like other flea beetles, it has powerful saltatorial hind legs specialized for jumping. Like all beetles, this insect is holometabolous The larvae are off white in color, 5-10mm in length, have a sclerotized head capsule and a short posterior protrusion.
It is a common insect pest in the eastern United States. Although its origin is uncertain, S. frontalis is thought to be a native species. It has become a highly destructive pest of ornamental plants in nurseries. It creates "extensive perforations" in the leaves while feeding on common ironweed, Vernonia fasciculata. It is also known to enjoy hydrangeas. Currently, researchers are looking to better understand its phenology and biology to come up with more sustainable pest management practices than frequent spraying of pesticides.
Systena frontalis produces one generation a year under natural conditions, but when infesting the container production of plants it may have up to four generations... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Washington | 🇺🇸 United States | |
| 4 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Red-Headed Systena sighting in New York City on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 1254th 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 Red-Headed Systena in New York City on a given day, so our monthly data shows no clear season.
Among the best
Of the 4 cities where we can rate Red-Headed Systena sightings, New York City ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Montreal (Canada, under 5%), Dallas (United States, under 5%) and Washington (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Red-Headed Systena is recorded against all the insects logged in New York City (7 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.
