Caecilia thompsoni, commonly called Thompson's caecilian, is a species of caecilian in the family Caeciliidae. It is endemic to Colombia. It is the largest of the worm-like caecilians and reaches a length of 1.5 m (5 ft) and can weigh up to about 1 kg (2.2 lb). Its natural habitats are subtropical or tropical moist lowland forest, subtropical or tropical moist montane forest, plantations, rural gardens, and heavily degraded former forest.