Bothrops bilineatus
Silhouette: Steven Traver · PhyloPic
In 3 days ~30% in a week ~60%
Bothrops bilineatus, also known as the two-striped forest-pitviper, parrotsnake, Amazonian palm viper, or green jararaca, is a highly venomous pit viper species found in the Amazon region of South America. Two subspecies are currently recognized, including the nominate subspecies described here. A pale green arboreal species that may reach 1 m (3.3 ft) in length, it is an important cause of snakebite throughout the entire Amazon region.
Adults usually do not grow to more than 70 cm (28 in) in length, although some may reach 100 cm (39 in). The maximum reported size is 123 cm (48 in). The body is relatively slender, with a prehensile tail. The scalation includes 23–35 dorsal scales at midbody, 190–218/192–220 ventral scales in males/females and 65–76/55–73 mostly divided subcaudal scales in males/females. On the head are 5–9 keeled intersupraoculars, 8–12 sublabial scales and 7–9 supralabial scales. Of the latter, the second is usually fused with the prelacunal to form a lacunolabial, although partial or complete sutures may exist to separate these scales.
The colour pattern consists of a pale green ground colour overlaid dorsally with either a peppering of black spots... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brownsberg Nature Park | 🇸🇷 Suriname | |
| 2 | Tambopata National Reserve | 🇵🇪 Peru | |
| 3 | Manu National Park | 🇵🇪 Peru | |
| 4 | Yasuní National Park | 🇪🇨 Ecuador |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Fort Worth Zoo | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Green Jararaca sighting in Manu National Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 31st most-seen of the 56 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
November
In that month about 30% of wildlife watchers report a Green Jararaca in Manu National Park on a given day, against under 5% in March, May–September and December, the lowest months. That is one of Manu National Park's wettest months, with about 240 mm of rain against 60 mm in August.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Green Jararaca sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
3rd of 4
Of the 4 parks where we can rate Green Jararaca sightings, Manu National Park ranks 3rd at about 10%. The best odds are in Brownsberg Nature Park (Suriname, about 50%) and Tambopata National Reserve (Peru, about 10%).
Same genus: Bothrops
The closest relatives of the Green Jararaca that you can see in Manu National Park (genus Bothrops, Neotropical Lanceheads) are Barba Amarilla (about 30%) and Brazil's Lancehead (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Green Jararaca is recorded against all the reptiles logged in Manu National Park (13 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.
