Eurema boisduvaliana
In 3 days ~30% in a week ~50%
Eurema boisduvaliana, commonly known as Boisduval's yellow, is a butterfly in the family Pieridae. It is found from Costa Rica north to Mexico. Rare strays may be found in southern Florida, but it is a regular migrant to south-eastern Arizona, south-western New Mexico, and southern Texas. The habitat consists of subtropical forests and forest edges, scrubs, roadsides and pastures.
The wingspan is 38–51 mm (1.5–2.0 in). Adults are on wing from April to November in southern Texas and northward. They are on wing year round in the tropics. Adults feed on flower nectar. The larvae feed on Cassia species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Arrecifes de Cozumel National Park | 🇲🇽 Mexico |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Boisduval's Yellow sighting in Arrecifes de Cozumel National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th most-seen of the 27 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.
March and October–November
In those months about 20% of wildlife watchers report a Boisduval's Yellow in Arrecifes de Cozumel National Park on a given day, against under 5% in February and April–September, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Boisduval's Yellow sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Arrecifes de Cozumel National Park, in our data
Arrecifes de Cozumel National Park is the only park on Wallace's Line with enough records to rate Boisduval's Yellow sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Boisduval's Yellow is recorded against all the insects logged in Arrecifes de Cozumel National Park (6 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.
