Ruby-eyed Green Pitviper

Ruby-eyed Green Pitviper

Craspedocephalus rubeus

50–60% · Likely
overall probability at Cat Tien National Park
96 Verified records at Cat Tien National Park
June Best month highest sighting rate
☀️ Diurnal When it's active during daytime hours (6am–6pm)

Trimeresurus rubeus, commonly known as the ruby-eyed green pitviper, is a venomous pit viper species endemic to Southeast Asia. It occurs in southern Vietnam and eastern Cambodia. No subspecies are currently recognized. Trimeresurus rubeus inhabits seasonal tropical forests, including lightly disturbed ones. All specimens have been recorded at night in dense vegetation, often near fast-flowing streams. It is known from elevations below 500 m (1,600 ft) above sea level. Wikipedia →

50–60% of wildlife watchers report a Ruby-eyed Green Pitviper sighting in Cat Tien National Park, based on 96 days of visitor records from GBIF citizen-science data.

Closest Relatives at Cat Tien National Park

White-lipped Pit Viper
LC

White-lipped Pit Viper

☀️ Diurnal Reptile

Trimeresurus albolabris

20–30% · Possible
Taiwanese Habu
LC

Taiwanese Habu

☀️ Diurnal Reptile

Protobothrops mucrosquamatus

Insufficient data

📅 Monthly Probability

30–40
Jan
5–10
Feb
30–40
Mar
40–50
Apr
60–70
May
60–70
Jun
50–60
Jul
10–20
Aug
50–60
Sep
40–50
Oct
60–70
Nov
60–70
Dec

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Cat Tien National Park 🇻🇳 Vietnam
50–60%

More parks will be added in future updates.

Quick answers

What are the chances of seeing a Ruby-eyed Green Pitviper in Cat Tien National Park?

About 55% of wildlife watchers report a Ruby-eyed Green Pitviper sighting in Cat Tien National Park, based on 96 days of visitor records from GBIF citizen-science data.

When is the best time to see Ruby-eyed Green Pitviper in Cat Tien National Park?

June has the highest sighting rate for Ruby-eyed Green Pitviper in Cat Tien National Park in our monthly data.

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