How to Identify the Indochinese Spitting Cobra (Identification Guide)

Key identifying features

The Indochinese spitting cobra (Naja siamensis) is a medium-sized elapid, typically 1–1.3 m long, with a slender-to-moderate build and a hood narrower and less rounded than that of the larger true cobras. When threatened, it raises the front third of its body, spreads a relatively slim hood, and can eject venom toward the eyes of a perceived threat from over a meter away, a behavior shared with other spitting cobras and a strong contextual clue when observed at a distance.

Coloration & pattern

Color is highly variable across its range, from grayish or olive-brown to nearly black, often with irregular pale speckling or mottling scattered across the body. Many individuals show pale crossbands or blotches on the throat and hood, visible when the hood is spread, though some populations are nearly patternless. The venter is typically pale gray to cream with dark blotches or bands, especially toward the throat, forming an irregular banded pattern unlike the more uniform bellies of many other cobra species.

Head, eyes & scales

The head is moderately distinct from the neck, flattened, and covered in large smooth scales typical of elapids. The eyes are round-pupiled and moderately sized. Body scales are smooth and glossy, arranged in the typical cobra pattern of relatively few dorsal scale rows at midbody. The hood, when expanded, is narrower and somewhat flatter than that of the larger monocled or Indian cobras, lacking a prominent single eye-spot marking on the hood's rear.

Size & body shape

Adults commonly range from 90 cm to 1.3 m, occasionally slightly longer, with a moderately robust body and a tail of average length that tapers gradually. Overall proportions are somewhat more slender than the bulkier monocled cobra, giving the species a leaner silhouette when moving or resting.

Range & habitat where you'll see it

This species occurs across Thailand, Cambodia, Laos, Vietnam, and adjacent parts of Myanmar, favoring open lowland habitats including scrubland, agricultural fields, rice paddies, and areas near human settlements. It is often encountered at night or dusk, frequently near water sources, rodent burrows, or termite mounds it may use for shelter.

How to tell it apart from look-alikes

The Indochinese spitting cobra overlaps in range with the monocled cobra (Naja kaouthia), which is generally more robust with a rounder hood typically bearing a distinct pale ring or "monocle" marking on the rear hood. The Indochinese spitting cobra lacks this monocle marking and instead shows irregular blotching or banding, particularly on the throat. It can also resemble other regional Naja species; consistent field marks are the narrower hood shape, irregular pale banding on a dark body, and the mottled rather than uniformly marked belly.