Euchloe lotta
In 3 days ~10% in a week ~30%
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 Saguaro National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 167th most-seen of the 354 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February and March
In those months about 10% of wildlife watchers report a Desert Marble in Saguaro National Park on a given day, against under 5% in April 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.
Among the best
Of the 2 parks where we can rate Desert Marble sightings, Saguaro National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Joshua Tree National Park (United States, about 10%).
Same family: Pieridae
The closest relatives of the Desert Marble that you can see in Saguaro National Park (family Pieridae, Whites, Yellows, and Sulphurs) are Dainty Sulphur (about 30%), Sleepy Orange (about 20%) and Southern Dogface (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 Saguaro National Park (14 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.
