Synanthedon scitula
In 3 days ~10% in a week ~20%
Synanthedon scitula, the dogwood borer or pecan borer, is a moth that is a pest of many plants including the dogwood and pecan. It is notorious due to the severity of damage it can cause and its widespread geographical distribution.
Synanthedon scitula eggs are a light chestnut brown color and are 0.4 to 0.6 millimeters across. They are marked with a hexagonal pattern of lines. The eggs are laid singly by the mother and take 8–9 days to hatch. Synanthedon scitula larvae are cream colored with a red head. They pass through six instars ranging in length from 1 millimeter to 15 millimeters or more at the last instar. Soon after hatching they burrow into the burrknot tissue or areas around bark scales. As the dogwood borer larvae feed red frass is pushed to the surface. It collects and is pushed to the surface and held together by silk. Larvae overwinter in their feeding tunnel, and resume eating whenever the temperature exceeds 45 to 50 degrees Fahrenheit, or 7 to 10 degrees Celsius.
The larvae pupate in their feeding tunnel in a tough silken cocoon covered with bits of frass. The length of pupation varies from 8 to 20 days... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Houston | 🇺🇸 United States | |
| 2 | Montreal | 🇨🇦 Canada | |
| 3 | Denver | 🇺🇸 United States | |
| 4 | Austin | 🇺🇸 United States | |
| 5 | Philadelphia | 🇺🇸 United States | |
| 6 | Boston | 🇺🇸 United States | |
| 7 | Dallas | 🇺🇸 United States | |
| 8 | New York City | 🇺🇸 United States | |
| 9 | Vancouver | 🇨🇦 Canada | |
| 10 | Chicago | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Dogwood Borer Moth sighting in Philadelphia on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 471st most-seen of the 632 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Dogwood Borer Moth in Philadelphia on a given day, so our monthly data shows no clear season.
Among the best
Of the 11 cities where we can rate Dogwood Borer Moth sightings, Philadelphia ranks 5th at under 5%, level with the leaders once rounded. The best odds are in Houston (United States, under 5%), Montreal (Canada, under 5%) and Denver (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Dogwood Borer Moth is recorded against all the insects logged in Philadelphia (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.
