Rhagastis rubetra 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 Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

 (Kalimantan, Nias, Sumatra) north through Malaysia (Sarawak, Peninsular) to 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...

 and possibly southern China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

 (Tibet).

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...

, Rhagastis hayesi

Rhagastis hayesi

Rhagastis hayesi is a moth of the Sphingidae family. It is known from south-east Asia, including Burma, Vietnam and Thailand.It is similar to Rhagastis acuta but can be distinguished by the lateral pattern of the abdomen, the forewing upperside ground colour which is always darker olive-brown and...

and Rhagastis velata

Rhagastis velata

Rhagastis velata is a moth of the Sphingidae family. It is known from Nepal, north-eastern India, Thailand, central and southern China and Taiwan....

but distinguishable from the first two by the forewing upperside ground colour and from the last by the shape of the labial palp, which is strongly narrowed towards the base. The forewing upperside is similar to Rhagastis velata, but the ground colour ranges from pale grey to grey green (olive-green in Rhagastis velata). The intensity of the dark markings varies considerably from almost absent to strongly present.