Callosamia promethea
In 3 days ~10%
Callosamia promethea, commonly known as the promethea silkmoth, is a member of the family Saturniidae, which contains approximately 2,300 species. It is also known as the spicebush silkmoth, which refers to one of the promethea silkmoth's common host plants, spicebush (Lindera benzoin). C. promethea is classified as a silk moth, which stems from its ability to produce silk, which it does in the formation of its cocoon. C. promethea lives in forests in the eastern U.S. and does not damage the trees on which it lives. The species was first described by Dru Drury in 1773.
Callosamia promethea hatches from its eggs and feeds on its host plants before pupating while hanging from trees during the winter. It then emerges and mates during a specific time of day. The females utilize pheromones to attract males for mating, with both sexes mating multiple times. They are the only moth in their family where the sexes are not active at the same time of day, with males being diurnal and females being nocturnal. They only overlap in activity for a few hours in the early evening. The males use mimicry of the poisonous pipevine swallowtail butterfly as a form of protection from predators. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 3 | Point Pelee National Park | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Philadelphia | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States | |
| 4 | Chicago | 🇺🇸 United States | |
| 5 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Promethea Silkmoth sighting in Chicago on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 751st most-seen of the 978 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 Promethea Silkmoth in Chicago on a given day, so our monthly data shows no clear season.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Promethea Silkmoth sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 cities where we can rate Promethea Silkmoth sightings, Chicago ranks 4th at under 5%. The best odds are in Boston (United States, about 10%), Philadelphia (United States, under 5%) and New York City (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Promethea Silkmoth is recorded against all the insects logged in Chicago (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.
