Bothrops lanceolatus — known as the fer-de-lance, Martinican pit viper, and Martinique lancehead — is a species of pit viper generally considered endemic to the island of Martinique. No one has satisfactorily explained why it has flourished there but is unknown on nearly all other Caribbean islands. Some reserve the common name fer-de-lance for this species, while others apply that name to other Bothrops species as well. No subspecies are currently recognized.