Eurema daira
In 3 days ~30% in a week ~60%
Eurema daira, the fairy yellow, barred yellow or barred sulphur, is a butterfly of the family Pieridae. The species was first described by Jean-Baptiste Godart in 1819. It is found from Argentina north to the southern United States. Strays can be found up to southern Arizona, South Dakota, southern Texas and even Washington, D.C.
The wingspan is 32–41 mm. Adults are on wing year round in the southern part of the range and in late summer and fall as vagrant. The larvae feed on Fabaceae species, including Stylosanthes biflora and Aeschynomene species. Adults feed on the nectar of various flowers including joint vetches and shepherd's needle, and are the principal pollinators of Cnidoscolus urens. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cabo Pulmo National Park | 🇲🇽 Mexico | |
| 2 | Everglades National Park | 🇺🇸 United States | |
| 3 | Big Cypress National Preserve | 🇺🇸 United States | |
| 4 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 5 | Cerro Azul Meámbar National Park | 🇭🇳 Honduras | |
| 6 | Lago de Yojoa | 🇭🇳 Honduras |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Miami | 🇺🇸 United States | |
| 2 | Guadalajara | 🇲🇽 México | |
| 3 | Puebla | 🇲🇽 México | |
| 4 | Orlando | 🇺🇸 United States | |
| 5 | San José | 🇨🇷 Costa Rica | |
| 6 | Mexico City | 🇲🇽 México |
With luck
About 10% of wildlife watchers report a Barred Yellow sighting in Merritt Island National Wildlife Refuge on a given day, based on 38 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 31st most-seen of the 189 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.
November
In that month about 30% of wildlife watchers report a Barred Yellow in Merritt Island National Wildlife Refuge on a given day, against under 5% in April and August, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Barred Yellow sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 6
Of the 6 parks where we can rate Barred Yellow sightings, Merritt Island National Wildlife Refuge ranks 4th at about 10%. The best odds are in Cabo Pulmo National Park (Mexico, about 30%), Everglades National Park (United States, about 20%) and Big Cypress National Preserve (United States, about 20%).
GBIF citizen-science records
It is estimated from how often the Barred Yellow is recorded against all the insects logged in Merritt Island National Wildlife Refuge (38 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.
