Hamadryas glauconome
In 3 days ~20% in a week ~50%
Hamadryas glauconome, the pale cracker or glaucous cracker, is a species of cracker butterfly in the family Nymphalidae. It was described by Henry Walter Bates in 1864 and is found in Mexico, Central America and south to Peru. It has been recorded as an unexpected vagrant in the United States in southern Florida, Arizona and Texas.
Adults have wings mottled in grey, brown and white. They are very similar in appearance to the grey cracker (Hamadryas februa) and like them have small, submarginal eyespots on the underside of the hindwings that incorporate some orange scales; these are the only two members of the genus to have orange eyespot scales. The pale cracker differs from the grey cracker in lacking a small red bar on the forewing.
The pale cracker is native to Mexico, Central America and South America as far south as Guatemala and Peru. It has been recorded as a vagrant in the United States, in southeastern Arizona (rare stray), south Texas (one sighting) and Florida. It is found in open areas with scattered trees, both moist areas and semi-arid ones.
Adults do not visit flowers, instead feeding on rotting fruit, carrion... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Calakmul Biosphere Reserve | 🇲🇽 Mexico | |
| 2 | Biotopo Cerro Cahuí | 🇬🇹 Guatemala | |
| 3 | Cañón del Sumidero National Park | 🇲🇽 Mexico |
With luck
About 10% of wildlife watchers report a Glaucous Cracker sighting in Cañón del Sumidero National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 36th most-seen of the 46 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
February
In that month about 20% of wildlife watchers report a Glaucous Cracker in Cañón del Sumidero National Park on a given day, against under 5% in January, April–June, August–September and November, the lowest months. That is one of Cañón del Sumidero National Park's driest months, with about 5 mm of rain against 260 mm in June.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Glaucous Cracker sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 parks where we can rate Glaucous Cracker sightings, Cañón del Sumidero National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Calakmul Biosphere Reserve (Mexico, about 10%) and Biotopo Cerro Cahuí (Guatemala, about 10%).
GBIF citizen-science records
It is estimated from how often the Glaucous Cracker is recorded against all the insects logged in Cañón del Sumidero 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.
