Hamadryas feronia
In 3 days ~60% in a week ~90%
Hamadryas feronia, the blue cracker or variable cracker, is a species of cracker butterfly in the family Nymphalidae. It is found in the southern parts of North America and South America and southwards Brazil. Hamadryas feronia is similar in appearance to Hamadryas guatemalena and Hamadryas iphthime. The upperside of the fore wing is a mosaic pattern of white, brown and bluish-grey, with a row of small eyespots parallel with the outer margin; a small red bar occupies the discal cell. The upperside of the hind wing is similar but has few white patches and larger more distinct eyespots. The underside of the fore wing is white or whitish-tan with dark markings, a small red bar and a black submarginal eyespot, and the under hind wing is white or whitish-tan, with dark markings and blue rings containing larger eyespots near the rear margin.
The larva has two colour morphs; it is either bluish-black above with brownish-white speckles and reddish spots on the side, or it is greyish-green with a pale-coloured longitudinal line on the side. It has dorsal spines on the second and third thoracic segments and on the seventh and eighth abdominal segments. The pupa has two long... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rincón de la Vieja National Park | 🇨🇷 Costa Rica | |
| 2 | Lago de Yojoa | 🇭🇳 Honduras | |
| 3 | Soberanía National Park | 🇵🇦 Panama | |
| 4 | Parque Natural Metropolitano | 🇵🇦 Panama | |
| 5 | Tijuca National Park | 🇧🇷 Brazil | |
| 6 | La Amistad International Park (Panama) | 🇵🇦 Panama |
Possible
About 30% of wildlife watchers report a Variable Cracker sighting in Fortaleza on a given day, based on 39 verified sightings from GBIF citizen-science data. It is the 6th most-seen of the 112 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
August and October
In those months about 40% of wildlife watchers report a Variable Cracker in Fortaleza on a given day, against under 5% in March and May, the lowest months. Those are among Fortaleza's driest months, with about 10 mm of rain a month against 240 mm in April.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Variable Cracker 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 15 cities where we can rate Variable Cracker sightings, Fortaleza has the highest daily chance: about 30%. Next come São Luís (Brazil, about 20%) and Valencia (Venezuela, about 20%).
Same genus: Hamadryas
The closest relatives of the Variable Cracker that you can see in Fortaleza (genus Hamadryas, Cracker Butterflies) are Gray Cracker (about 10%) and Red Cracker (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Variable Cracker is recorded against all the insects logged in Fortaleza (39 verified sightings), 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.
