Euchloe lotta
In 3 days ~30% in a week ~60%
Euchloe lotta, the desert marble, is a species of butterfly that occurs in the interior of British Columbia, Canada. It is mostly white with black markings on the topside of the forewing tips and body. The underside has greenish-grey veins especially in the hindwing. The wingspan is from 38 to 40 mm.
The desert marble's flight season in North America is from April to May. It inhabits sagelands, deserts, juniper woodland, dry, rocky areas, dry ravines, and canyon walls. Larvae feed on Arabis furcata, Arabis sparsiflora, Arabis bolboellii, and Halimolobos whitedi. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Joshua Tree National Park | 🇺🇸 United States | |
| 2 | Saguaro National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Desert Marble sighting in Joshua Tree National Park on a given day, based on 42 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 50th 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 60%, if each day is a fresh chance.
February and April
In those months about 20% of wildlife watchers report a Desert Marble in Joshua Tree National Park on a given day, against under 5% in May to January, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Desert Marble 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 Desert Marble sightings, Joshua Tree National Park has the highest daily chance: about 10%. Next come Saguaro National Park (United States, about 10%).
Same family: Pieridae
The closest relatives of the Desert Marble that you can see in Joshua Tree National Park (family Pieridae, Whites, Yellows, and Sulphurs) are Checkered White (about 30%), Sleepy Orange (about 20%) and Sara Orangetip (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Desert Marble is recorded against all the insects logged in Joshua Tree National Park (42 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.
