title: Smerinthus planus
text: # Smerinthus planus
  
  Smerinthus planus, the Oriental eyed hawkmoth, is a moth of the family Sphingidae. It was described by Francis Walker in 1856. It is found from northern Xinjiang across northern China, Mongolia and south-eastern Siberia to the Russian Far East and Japan, and then south through Korea and Taiwan to Hainan, Yunnan and eastern Tibet.
  
  The wingspan is 70–100 mm. There are probably two generations per year in western China. Depending on latitude and weather, there are between one and four generations farther east in China, with adults on wing between April and September.
  
  The larvae feed on Populus and Salix species.
  
  