Chlosyne janais
In 3 days ~20% in a week ~40%
Chlosyne janais, the crimson patch or janais patch, is a common New World butterfly found from Colombia north through Central America and Mexico to southern Texas, with occasional sightings in southeastern Mexico and northern Texas. The dorsal and ventral wing surface is black with several undulating rows of small white spots on the medial forewings and along all outer wing margins. On each dorsal hindwing is a medial orange-red patch situated anteriorly. The ventral hindwings have a fragmented yellow proximal patch bordered by a thick postmedial band of red that does not reach the wing margins; maximum wingspan is 4.8–6.7 cm.
Adults inhabit the periphery of lowland tropical to subtropical forests, fields, and along streams, where they feed on flower nectar. Reproduction is continuous in the tropics, whereas in temperate areas several broods are produced from July to November. The caterpillars are grey white to green with several transverse rows of fleshly black spines; they feed primarily on acanthus shrubs, especially Anisacanthus wrightii and Odontonema callistachus (in Texas), upon which adult females lay their eggs.
The crimson patch can reach high numbers in the Rio Grande Valley, but the population is periodically killed off by cold snaps; the area is then recolonized by members of the Mexican population. A very similar species is the rosita patch (C. rosita), which is distinguished from the crimson patch by the former's lack of spots on the wing margins. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tikal National Park | 🇬🇹 Guatemala | |
| 2 | Lago de Yojoa | 🇭🇳 Honduras | |
| 3 | Montes Azules Biosphere Reserve | 🇲🇽 Mexico | |
| 4 | Gandoca-Manzanillo Wildlife Refuge | 🇨🇷 Costa Rica | |
| 5 | Cerro Azul Meámbar National Park | 🇭🇳 Honduras | |
| 6 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 7 | Cañón del Sumidero National Park | 🇲🇽 Mexico | |
| 8 | Carara National Park | 🇨🇷 Costa Rica | |
| 9 | Cahuita National Park | 🇨🇷 Costa Rica | |
| 10 | La Amistad International Park (Panama) | 🇵🇦 Panama | |
| 11 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 12 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San José | 🇨🇷 Costa Rica | |
| 2 | Mexico City | 🇲🇽 México | |
| 3 | San Salvador | 🇸🇻 El Salvador | |
| 4 | Puebla | 🇲🇽 México | |
| 5 | Monterrey | 🇲🇽 México | |
| 6 | San Antonio | 🇺🇸 United States | |
| 7 | Panama City | 🇵🇦 Panama |
With luck
About 10% of wildlife watchers report a Crimson Patch sighting in Braulio Carrillo National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 290th most-seen of the 378 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
November
In that month about 20% of wildlife watchers report a Crimson Patch in Braulio Carrillo National Park on a given day, against under 5% in April–May, July–September and December–January, the lowest months. That is one of Braulio Carrillo National Park's wettest months, with about 550 mm of rain against 170 mm in April.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Crimson Patch sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
11th of 12
Of the 12 parks where we can rate Crimson Patch sightings, Braulio Carrillo National Park ranks 11th at about 10%. The best odds are in Tikal National Park (Guatemala, about 30%), Lago de Yojoa (Honduras, about 20%) and Montes Azules Biosphere Reserve (Mexico, about 20%).
GBIF citizen-science records
It is estimated from how often the Crimson Patch is recorded against all the insects logged in Braulio Carrillo 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.
