“It is a sad irony that the snake’s rattle, which functions as a warning device, is widely regarded as a bellicose drumroll, or war-cry, instead. It may well have been in a mood of remorse for having killed a rattlesnake on impulse that [William] Bartram, vowing solemnly that he ‘would never again be accessory to the death of a rattle snake,’ painted his marvelous portrait of a coiled rattler.” Christopher Benfey on Rattlesnake Island, a sanctuary set up to protect the woodland serpents from their greatest danger — us.