The Sphingidae are a family of moths (Lepidoptera), commonly known as hawk moths, sphinx moths, and hornworms; it includes about 1,450 species. It is best represented in the tropics, but species are found in every region. They are moderate to large in size and are distinguished among moths for their rapid, sustained flying ability. Their narrow wings and streamlined abdomens are adaptations for rapid flight. Sphingids are some of the faster flying insects; some are capable of flying at over 5.3 m/s (12 miles per hour). They have wingspans from 4 to over 10 cm.