Dark-based gliding hawkmoth, Ambulyx substrigilis Westwood, 1847 – Sarawak / Borneo – around 1000m ASL

Ambulyx substrigilis occurs from Sri Lanka, India, Nepal, Bhutan and Bangladesh east to the Andaman and Nicobar Islands, Thailand, Vietnam, Hainan (China), Peninsular and Sarawak Malaysia, Sumatra and Kalimantan (Indonesia), and the Philippines. Adults have a wingspan of 96–120 mm and show pale tawny-ochreous to darker forms; compared with similar Ambulyx species, the forewing submarginal line is more strongly incurved and the hindwing basal patch is often pale and not sharply defined.