Cryptelytrops purpureomaculatus (Mangrove Pit Viper, also known as mangrove viper, shore pit viper, purple-spotted pit viper, shore pitviper.
Thais Say: Ngoo pang ka
Length: Males grow to about 60cm and females to 90 cm on average.
Habitat: Usually near water and very wet areas. However, recently one was found on a sidewalk by a bungalow on the island of Koh Phi Phi in Krabi province, Thailand. They like stream banks with good cover – low lying plants that they can hide under. They like hilly habitat.
Behavior: These snakes are very easily agitated, and once they get going they are hard to calm down. Their strikes are very fast, but thankfully – short. These are known by snake handlers to have a “bad temper”.
These Thailand vipers are rather hard to identify – but they are usually like the photo above – greyish with a bit of purple in the coloring. Some are very purple. We’ve also seen a brownish toned mangrove pit viper with some yellow highlights. Now for our top photo we have a greenish toned viper. Obviously – color is highly variable in this species.
Venom toxicity: Venomous and very toxic to humans. Though people have died as a result of bites from this snake, this is not usually the case.
Species: T. purpureomaculatus
Classified as – Trimeresurus purpureomaculatus by Gray in year 1832.
Mangrove pit viper photo courtesy of, and full copyright by – Richard Richert.
Thais say: Thai language sounds like Ngoo how chang, or ngoo chong ahng. There are many names for this snake.
Length: Max length about 5.8 meters. The presenter at the Saovabha Snake Farm in Bangkok said the largest king was caught in Nakhon si Thammarat in Thailand’s south, near Surat Thani province.
Range: All over Thailand and most of Southeast Asia.
Notes: I’ve seen just three in the wild. One I saw in a park – just the tail as it crossed the road behind me. I’m guessing it was a 8 meter King. I know, but I’m not joking. The tail was absolutely massive, long and thicker by nearly double that of other 5-meter kings I’ve seen many of. This was possibly the biggest King Cobra in the world. Kings are all over Thailand and can be found anywhere near houses, or really – anywhere. They are tremendously strong and smart animals. Please give the snake a large space and do not poke it with a stick. They are very fast moving. Juvenile king cobras can also kill you. Their venom is every bit as toxic as adults.
Habitat: Like many types of habitat. Dense forest near water and open grasslands. Love bamboo thickets for a nest. Ideal cover is a web of small bamboo growing about a meter high with soft bamboo leaves underneath. The King I found last night was up a limestone mountain around 100 meters elevation. In Thailand they are often found wherever rat snakes might be found because they seem to prefer them.
Kings seem to prefer mountains. The other two I found were also at some elevation (200 m and around 500 meters).
King cobras are usually terrestrial, but have been found many times in trees.
Active Time? The snake is mainly diurnal – found active during the daytime, but can also be active also at night.
Food: King cobras eat other smaller snakes primarily, but also will eat monitor lizards. Occasionally they’ll eat other king cobras, pythons, lizards, birds, rodents. I saw a 5 meter long king attempting to eat a 2.5 meter reticulated python. The King appeared intimidated by the strength of the python – it’s no pushover. Here is a photo of a 3 meter king eating a 2 meter red tailed racer snake.
Defensive Behavior: Lifts its head off the ground sometimes by as much as 4-5 feet, and flattens out the neck. The hood of a King cobra doesn’t flare as wide… but, a big King will scare you much more because they can be 5 times as long as the monocled or other cobras! These snakes are not usually that afraid of people, and move slowly to ‘escape’ if they move away at all. Last night I moved a 4 meter king off some steps at a local temple so people could pass. It was not in ANY hurry to get away, and it came at me a couple of times. Impressive snakes, and be very afraid… I know a man personally, his brother was bitten on the chest and died in less than 10 minutes on the way to hospital.
Venom Toxicity: Very toxic, but monocled cobras (Naja kaouthia) and kraits (genus Bungarus) are more potent on the LD50 scale. The power of the King is in the volume of venom it can inject in one bite – maximum around 7ml! Kings can kill elephants with a bite.
Antivenom: There is a specific antivenin for the king cobras, but if the hospital you are at does not have it there is an alternative. Tiger snake antivenin can also work well.
Offspring: Lay eggs which they stay with in the nest until ready to hatch. When the eggs start to hatch the mother leaves because it eats other snakes primarily – and would likely eat the young. The young are fast, and deadly from the time they hatch. Juvenile king cobras from Thailand have yellow bands across their black bodies and heads. They look radically different from adult king cobra snakes. There is a danger of mistaking them for mangrove cat snakes (Boiga melanota).
Species: O. hannah
The kings in these photos are all beat up from bashing their faces against the cages at a snake show in Thailand. In the wild they are so beautiful… majestic… amazing snakes. I was so glad to see my first one in the wild last night. Even better to interact with it… Gotta love Thailand!
Video of a King Cobra breathing – you can hear it:
Range: Chumpon to Krabi Province in Thailand. I have found them in Krabi and Surat Thani provinces.
Notes: I found this one in the picture on a small hill at a Buddhist temple on a hill next to some steps. These venomous snakes are usually on the ground, but this one was laying in a bush about 1.3 meters high, right next to the path. It was non-aggressive and didn’t protest when I moved it away from the path with my long stick.
Habitat: The snake lives almost only on the ground where it hunts frogs and lizards. They also enjoy jungle, limestone mountains, and rubber plantations. I currently have one residing in my aquarium where it spends most time suspended from a branch just a few inches off the bottom of the tank.
Active Time? The snake is mainly nocturnal. Active during the day only after heavy rainfall. I have found all of mine during daylight hours.
Food: Mice, frogs, lizards. Predominantly mice. I have a good sized house gecko in the tank with this Cryptelytrops venustus, but so far she has shown no interest in it. I’ll go get some small mice here shortly. The pit vipers sense the heat of the animal and strike. The geckos are cold blooded so they are no hotter than their surroundings.
Defensive Behavior: The snake is very slow during the day and only bites if seriously aggravated. I ran into a reptile poacher in a Thailand forest and he was hand carrying one of these brown spotted green pit vipers in his left hand and had a large box turtle in his other hand. I told him – PIT! Venomous… He insisted “no, it wasn’t” and held it up to his face where the snake immediately bit him on the cheek near the lips. It let go after 1-2 seconds. He said – See?? I promptly bought the snake from him, to keep him from further harm. Not sure what hospital he was at that night!
Venom Toxicity: Mildly toxic. Bites are painful usually without significant effects. Probably this viper would need to bite down for a number of seconds to transfer enough volume of venom that it would be seriously detrimental. Bites are to be considered potentially deadly.
Offspring: The beautiful pit viper I have now is likely gravid, which contradicts some other info I’ve seen about them having offspring in the June/July time-frame. This is December. She is not overly gravid and looks to be in the beginning stages, but still – I think only a couple of months are required for gestation… she’ll have an early birth – April maybe? These snakes birth live offspring in a gelly-like bubble that breaks after coming out of the female snake. Typical numbers are 20-30 young that are colored as the adults.
I could find little information about this snake beyond my own experience. Joachim Bullian at siam-info.de had some useful information which I’ve added to this article. As I said, I currently have one of these lovely snakes for a couple of days and will be adding info here to this fact sheet as I do updates.