Officials say the highly venomous snakes include two adults – twometreslong – and 13 onemetrelong young ones.
Anyone spotting the snakes must alert the Zoo and Wildlife Veterinary Society of Thailand via hotline 1362 or the Jor Sor 100 radio station at 027119160.
Wild Animal Rescue Foundation of Thailand vicepresident Chisanu Tiyacharoensri said that green mambas are yellowish green in colour and are larger than green snakes. He urged people to stay away from the snakes and be careful not to be bitten because there was no serum available in Thailand at present for their venom.
Chisanu said a mamba bite victim would feel drowsy and could die in 20 minutes. If they survived, the victim would be on respiratory aid while waiting for serum to come from South America in 23 days.
For first aid in case of snakebite to a limb, Chisanu said the wound should be cleaned gently with soap and water, a piece of cloth should be wrapped tightly at least 7 centimetres above the bite. A second piece should be wrapped 7cms above the first. The victim should lie down before being quickly transported to hospital. He warned not to squeeze or cut the wound.