Zerene cesonia
In 3 days ~50% in a week ~80%
Zerene cesonia, the southern dogface, is a North and South American butterfly in the family Pieridae, subfamily Coliadinae (until recently the species was sometimes placed in the related genus Colias instead of Zerene). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Bend National Park | 🇺🇸 United States | |
| 2 | Saguaro National Park | 🇺🇸 United States | |
| 3 | Bahía de Loreto National Park | 🇲🇽 Mexico | |
| 4 | Cabo Pulmo National Park | 🇲🇽 Mexico | |
| 5 | Reserva de la Biosfera Mariposa Monarca | 🇲🇽 Mexico | |
| 6 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 7 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 8 | Point Pelee National Park | 🇨🇦 Canada | |
| 9 | Padre Island National Seashore | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | La Paz | 🇧🇴 Bolivia | |
| 2 | Cochabamba | 🇧🇴 Bolivia | |
| 3 | San Luis Potosí | 🇲🇽 México | |
| 4 | San Antonio | 🇺🇸 United States | |
| 5 | Toluca | 🇲🇽 México | |
| 6 | Monterrey | 🇲🇽 México | |
| 7 | Austin | 🇺🇸 United States | |
| 8 | Guadalajara | 🇲🇽 México | |
| 9 | Puebla | 🇲🇽 México | |
| 10 | Mexico City | 🇲🇽 México |
Possible
About 20% of wildlife watchers report a Southern Dogface sighting in Big Bend National Park on a given day, based on 75 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 27th most-seen of the 329 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
August and October
In those months about 40% of wildlife watchers report a Southern Dogface in Big Bend National Park on a given day, against about 10% in March–May and July, the lowest months. Those are among Big Bend National Park's wettest months, with about 35 mm of rain a month against 10 mm in April.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Southern Dogface 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 9 parks where we can rate Southern Dogface sightings, Big Bend National Park has the highest daily chance: about 20%. Next come Saguaro National Park (United States, about 20%) and Bahía de Loreto National Park (Mexico, about 20%).
Same family: Pieridae
The closest relatives of the Southern Dogface that you can see in Big Bend National Park (family Pieridae, Whites, Yellows, and Sulphurs) are Sleepy Orange (about 30%), Lyside Sulphur (about 30%) and Dainty Sulphur (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Southern Dogface is recorded against all the insects logged in Big Bend National Park (75 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.
