Officials in Thailand have seized 600 cobras that were due to be smuggled out of the country into Laos.
They were in the back of a truck about 210km south of Bangkok. Police arrested the driver.
Customs officials estimate that the snakes were worth about 500,000 baht ($US16,500: £10,400).
The BBC says Thailand is a major transit hub in the international black market in animal smuggling.
Last month, Thai police rescued 16 tiger cubs also destined for Laos.