Porthidium nasutum
Silhouette: Steven Traver · PhyloPic
In 3 days ~70% in a week >90%
Common names: hognosed pit viper, hognosed pit viper, rainforest hognosed pit viper, horned hog-nosed viper. Porthidium nasutum is a pit viper species native to southern Mexico, Central America and northern South America. No subspecies are recognized as being valid.
Adults of Porthidium nasutum are usually less than 40 centimetres (16 in) in total length (tail included), and rarely more than 60 centimetres (24 in). Females are considerably larger than males. Both sexes are moderately stout.
Porthidium nasutum is found in southern Mexico southward through Central America to western Colombia and northwestern Ecuador in South America. Inhabits the Atlantic lowlands from Mexico (Tabasco and Chiapas) through Belize, Guatemala, Honduras, Nicaragua and Costa Rica to eastern Panama and northwestern Colombia. In the Pacific lowlands, it occurs in southwestern Costa Rica, central and eastern Panama, continuing on to northwestern Ecuador. The type locality given is "Pansos [Panzós], sur les bords du Polochic [Alta Verapaz] (Guatémala)".
The preferred natural habitat of Porthidium nasutum is mesic lowland broadleaf or rainforest from... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pico Bonito National Park | 🇭🇳 Honduras | |
| 2 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Darién National Park | 🇵🇦 Panama | |
| 4 | Gandoca-Manzanillo Wildlife Refuge | 🇨🇷 Costa Rica | |
| 5 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 6 | Cahuita National Park | 🇨🇷 Costa Rica | |
| 7 | Braulio Carrillo National Park | 🇨🇷 Costa Rica |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | La Paz Waterfall Gardens | 🇨🇷 Costa Rica |
Likely
About 40% of wildlife watchers report a Rainforest Hog-nosed Viper sighting in Pico Bonito National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 9th most-seen of the 21 reptiles we can rate there. Over three days the chance rises to about 70%, and over a week to over 90%, if each day is a fresh chance.
May, August and October
In those months about 60% of wildlife watchers report a Rainforest Hog-nosed Viper in Pico Bonito National Park on a given day, against under 5% in January, March–April and June, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Rainforest Hog-nosed Viper sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 7 parks where we can rate Rainforest Hog-nosed Viper sightings, Pico Bonito National Park has the highest daily chance: about 40%. Next come Tenorio Volcano National Park (Costa Rica, about 30%) and Darién National Park (Panama, about 20%).
Same family: Viperidae
The closest relatives of the Rainforest Hog-nosed Viper that you can see in Pico Bonito National Park (family Viperidae, Vipers) are Central American Jumping Pit Viper (about 30%) and Fer-de-lance (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rainforest Hog-nosed Viper is recorded against all the reptiles logged in Pico Bonito National Park (9 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.
