Rainforest Hog-nosed Viper

Rainforest Hog-nosed Viper

Porthidium nasutum

Silhouette: Steven Traver · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~30% · Possible
at Tenorio Volcano National Park
20 Verified sightings at Tenorio Volcano National Park From 2019 to 2026
172 Verified sightings across all 13 parks From 2019 to 2026
November Best month highest sighting rate
☀️🌙 Day & Night When it's spotted Active throughout day and night

About the Rainforest Hog-nosed Viper

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 →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Pico Bonito National Park 🇭🇳 Honduras
~40%
2 Tenorio Volcano National Park 🇨🇷 Costa Rica
~30%
3 Braulio Carrillo National Park 🇨🇷 Costa Rica
~30%
4 Gandoca-Manzanillo Wildlife Refuge 🇨🇷 Costa Rica
~20%
5 Chagres National Park 🇵🇦 Panama
~20%
6 Montes Azules Biosphere Reserve 🇲🇽 Mexico
~20%
7 Cahuita National Park 🇨🇷 Costa Rica
~20%
8 Arenal Volcano National Park 🇨🇷 Costa Rica
~20%
9 Darién National Park 🇵🇦 Panama
~10%
10 La Amistad International Park (Panama) 🇵🇦 Panama
<5%
11 Utría National Natural Park 🇨🇴 Colombia
Insufficient data
12 Tapantí-Macizo de la Muerte National Park 🇨🇷 Costa Rica
Insufficient data
13 Tortuguero National Park 🇨🇷 Costa Rica
Insufficient data

Quick answers

What are the chances of seeing a Rainforest Hog-nosed Viper in Tenorio Volcano National Park?

About 30% of wildlife watchers report a Rainforest Hog-nosed Viper sighting in Tenorio Volcano National Park, based on 20 verified sightings from GBIF citizen-science data.

When is the best time to see Rainforest Hog-nosed Viper in Tenorio Volcano National Park?

November has the highest sighting rate for Rainforest Hog-nosed Viper in Tenorio Volcano National Park in our monthly data.

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