KINGDOM Animalia PHYLUM Chordata SUBPHYLUM Vertebrata CLASS Reptilia ORDER Squamata SUBORDER Serpentes FAMILY Colubridae GENUS Drymarchon SPECIES Drymarchon couperi Indigo snake, (Drymarchon corais), docile, nonvenomous member of the family Colubridae found from the southeastern United States to Brazil. It is the largest snake in the United States—record length is 2.6 metres (8.5 feet)—and one of the largest of all colubrids.

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