What are the chances of seeing a Swallow-Tailed Moth in Snowdonia National Park?
With luck
About 10% of wildlife watchers report a Swallow-Tailed Moth sighting in Snowdonia National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 138th most-seen of the 387 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.
When is the best time to see a Swallow-Tailed Moth in Snowdonia National Park?
July
In that month about 30% of wildlife watchers report a Swallow-Tailed Moth in Snowdonia National Park on a given day, against under 5% in August to May, the lowest months.
What time of day is best to see a Swallow-Tailed Moth?
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Swallow-Tailed Moth sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Is Snowdonia National Park the best place to see a Swallow-Tailed Moth?
Yes
Of the 5 parks where we can rate Swallow-Tailed Moth sightings, Snowdonia National Park has the highest daily chance: about 10%. Next come Cévennes National Park (France, about 10%) and Bavarian Forest National Park (Germany, about 10%).
Which relatives of the Swallow-Tailed Moth live in Snowdonia National Park?
Same family: Geometridae
The closest relatives of the Swallow-Tailed Moth that you can see in Snowdonia National Park (family Geometridae, Geometer Moths) are Brimstone Moth (about 30%), Small Phoenix (about 20%) and Peppered Moth (about 20%), with each one's daily chance of a sighting.
Where does the Swallow-Tailed Moth sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Swallow-Tailed Moth is recorded against all the insects logged in Snowdonia National Park (15 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.