The Siamese Cobra (Naja siamensis), A single bite from either of these snakes can incapacitate a human respiratory system within 30 minutes, after which death swiftly follows, unless an injection of antivenin is immediately available.
This is a medium-sized cobra with a rather thick body. The body color of this species is variable from grey to brown to black, with white spots or stripes. The white patterning can be so prolific that it covers the majority of the snake. Adults average 90–120 cm (3–4 ft) in length, and can reach a maximum of 1.6 meters (5 ft).
It is found in Southeast Asia, including Thailand, Cambodia, Vietnam, Laos and Burma. It occupies a range of habitats including lowlands, hills, plains, and woodland. It is sometimes attracted to human settlements because of the abundant populations of rodents in and around these areas.
It is a primarily nocturnal species interestingly, it shows variable temperament depending on the time of day it is encountered. When threatened during daylight hours, the snake is generally timid and seeks refuge in the nearest burrow. However, when the snake is threatened at night, it is more aggressive and is more likely to stand its ground, rear up and display its hood.
This cobra is capable of spraying venom up to 3 meters (10 ft). It usually aims for the intruder’s head.