Philotes pallescens
In 3 days ~30% in a week ~50%
Euphilotes pallescens, the pale blue, pallid blue or pallid dotted blue, is a species of butterfly of the family Lycaenidae. It is found in the United States in southeastern California, Nevada, southern Utah and northern Arizona.
The wingspan is 16–21 mm. Adults are on wing from July to September in one generation per year. They feed on the flower nectar of Eriogonum species. The larvae feed on the flowers and fruits of Eriogonum species, including E. kearneyi, E. microthecum and E. plumatella. The larvae are tended by ants. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Joshua Tree National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Pallid Blue sighting in Joshua Tree National Park on a given day, based on 34 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 57th most-seen of the 190 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
August
In that month about 40% of wildlife watchers report a Pallid Blue in Joshua Tree National Park on a given day, against under 5% in November to July, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Pallid Blue sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Joshua Tree National Park, in our data
Joshua Tree National Park is the only park on Wallace's Line with enough records to rate Pallid Blue sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Pallid Blue is recorded against all the insects logged in Joshua Tree National Park (34 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.
