Sphinx chersis
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Great Ash Sphinx sighting in Calgary on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 110th most-seen of the 256 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.
July to September
In those months about 10% of wildlife watchers report a Great Ash Sphinx in Calgary on a given day, against under 5% in October to June, 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.
4th of 9
Of the 9 cities where we can rate Great Ash Sphinx sightings, Calgary ranks 4th at under 5%. The best odds are in Las Vegas (United States, about 10%), Mesa (United States, under 5%) and Phoenix (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Great Ash Sphinx is recorded against all the insects logged in Calgary (18 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.
