Imantodes cenchoa
Silhouette: PhyloPic
In 3 days ~40% in a week ~70%
Imantodes cenchoa, also known commonly as the blunthead tree snake, the neotropical blunt-headed tree snake, and the fiddle-string snake, is a species of mildly venomous, rear-fanged snake in the family Colubridae. The species is native to Mexico, Central America, and South America.
The blunthead tree snake averages about 800 mm (31 in) in total length (including tail). Maximum total length is about 1.5 m (4 ft 11 in). I. cenchoa is known for its long, slender body and very large head. The pupil of its eye is very distinct from other snakes. Most snakes found around the world are known to have very poor vision and rely mostly on smell and vibrations to detect signs of prey and predators. Arboreal snakes have much better vision than other snakes. The blunthead tree snake has a vertical slit for a pupil which allows the snake to look downward. This trait gives the blunthead tree snake an advantage over other snakes. The large eyes make up approximately 26% of its head.
The ventral surface, or stomach, of the blunthead tree snake is mostly white, while the dorsal surface, or top, is a light or pale brown with lateral dark brown patches that begin at the head and continue... Wikipedia →
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Yumka' | 🇲🇽 Mexico |
Possible
About 20% of wildlife watchers report a Blunthead Tree Snake sighting in Corcovado National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 21st most-seen of the 41 reptiles we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
May and July
In those months about 30% of wildlife watchers report a Blunthead Tree Snake in Corcovado National Park on a given day, against under 5% in April, June and September–November, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Blunthead Tree Snake sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
23rd of 29
Of the 29 parks where we can rate Blunthead Tree Snake sightings, Corcovado National Park ranks 23rd at about 20%. The best odds are in Pico Bonito National Park (Honduras, about 50%), Cusuco National Park (Honduras, about 40%) and Tortuguero National Park (Costa Rica, about 40%). All parks ranked.
Same family: Colubridae
The closest relatives of the Blunthead Tree Snake that you can see in Corcovado National Park (family Colubridae, Colubrid Snakes) are Ornate Cat-eyed Snake (about 30%), Puffing Snake (about 20%) and Chicken Snake (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Blunthead Tree Snake is recorded against all the reptiles logged in Corcovado National Park (23 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.
