Sphinx chersis
In 3 days ~30% in a week ~60%
Sphinx chersis, the great ash sphinx or northern ash sphinx, is a moth that belongs to the family Sphingidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Zion National Park | 🇺🇸 United States | |
| 2 | Acadia National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Great Ash Sphinx sighting in Zion National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 42nd most-seen of the 114 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report a Great Ash Sphinx in Zion National Park on a given day, against under 5% in June–July and November–April, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Great Ash Sphinx sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Great Ash Sphinx sightings, Zion National Park has the highest daily chance: about 10%. Next come Acadia National Park (United States, about 10%).
Same family: Sphingidae
The closest relatives of the Great Ash Sphinx that you can see in Zion National Park (family Sphingidae, Sphinx Moths) are White-Lined Sphinx (about 20%), Western Poplar Sphinx (about 10%) and Carolina Sphinx (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Great Ash Sphinx is recorded against all the insects logged in Zion National Park (12 verified sightings from 2019 to 2026), 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.
