Rhagastis hayesi is a moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 of the Sphingidae

Sphingidae

Sphingidae is a family of moths , commonly known as hawk moths, sphinx moths and hornworms, that includes about 1,200 species . It is best represented in the tropics but there are species in every region . They are moderate to large in size and are distinguished among moths for their rapid,...

 family. It is known from south-east Asia

Asia

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

, including Burma, Vietnam

Vietnam

Vietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...

 and Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

.

It is similar to Rhagastis acuta

Rhagastis acuta

Rhagastis acuta is a moth of the Sphingidae family. It is known from south-east Asia, including India, Thailand and Indonesia.It is similar to Rhagastis velata and Rhagastis hayesi. The upperside of the abdomen has a pair of vestigial or well-developed lateral golden stripes. The forewing upperside...

but can be distinguished by the lateral pattern of the abdomen, the forewing upperside ground colour which is always darker olive-brown and the dark brown markings which are substantially larger. The hindwing upperside has no pale median band except for a small patch near the tornus.