Biston regalis is a moth of the family Geometridae. It is found in China (Liaoning, Henan, Shaanxi, Gansu, Zhejiang, Hubei, Jiangxi, Hunan, Fujian, Hainan, Sichuan, Yunnan), Taiwan, Russia (Amur, Ussuri), Japan, North Korea, South Korea, India, Nepal, the Philippines, Pakistan and the United States.
Subspecies Biston regalis regalis Biston regalis comitata (Warren, 1899)
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