Red-tailed Green Ratsnake

Red-tailed Green Ratsnake

Gonyosoma oxycephalum

Silhouette: Alex Slavenko · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~30% · Possible
at Khao Sok National Park
27 Verified sightings at Khao Sok National Park From 2019 to 2026
114 Verified sightings across all 11 parks From 2019 to 2026
January Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Red-tailed Green Ratsnake

Gonyosoma oxycephalum, known commonly as the arboreal ratsnake, the red-tailed green rat snake, and the red-tailed racer, is a species of snake in the family Colubridae. The species is endemic to Southeast Asia. It was first described by Friedrich Boie in 1827.

G. oxycephalumm is found in Indonesia (Bangka, Belitung, Java, Kalimantan/Borneo, Karimata, Legundi, Lombok, Mentawai islands, Natuna islands, Nias, Panaitan, Riau archipelago, Sebuku, Sumatra, Tambelan archipelago), Malaysia (Malaya and East Malaysia, Pulau Tioman ?),

Singapore Island, Penang Island, India (Andaman Islands), Myanmar, Thailand (incl. Phuket), Cambodia, Laos, Vietnam, Philippine Islands (Balabac, Bohol, Catanduanes, Lubang, Luzon, Negros, Palawan, Sulu Archipelago, Panay).

The type locality is Indonesia: Java (F. Boie, 1827). G. oxycephalum is a robust powerful snake, with wide smooth scales on its belly that are ideal for climbing trees and across branches. It has smaller, smooth scales on its back, which is usually bright green or light green and may have a black net-like pattern. A gray-colored morph with a yellow head exists in Panay, in the Philippines.

As some of its... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Khao Sok National Park 🇹🇭 Thailand
~30%
2 Danum Valley Conservation Area 🇲🇾 Malaysia
~20%
3 Sepilok 🇲🇾 Malaysia
~20%
4 Taman Negara National Park 🇲🇾 Malaysia
~20%
5 Cat Tien National Park 🇻🇳 Vietnam
~10%
6 Kinabalu Park 🇲🇾 Malaysia
~10%
7 Khao Yai National Park 🇹🇭 Thailand
~10%
8 Gunung Leuser National Park 🇮🇩 Indonesia
~10%
9 Kinabatangan Wildlife Sanctuary 🇲🇾 Malaysia
~10%
10 Kaeng Krachan National Park 🇹🇭 Thailand
~10%
11 Khao Luang National Park 🇹🇭 Thailand
Insufficient data

Quick answers

What are the chances of seeing a Red-tailed Green Ratsnake in Khao Sok National Park?

About 30% of wildlife watchers report a Red-tailed Green Ratsnake sighting in Khao Sok National Park, based on 27 verified sightings from GBIF citizen-science data.

When is the best time to see Red-tailed Green Ratsnake in Khao Sok National Park?

January has the highest sighting rate for Red-tailed Green Ratsnake in Khao Sok National Park in our monthly data.

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