 Trimeresurus mcgregori

Trimeresurus mcgregori, commonly known as the McGregor's pit viper or the Batanes pit viper, is a venomous pitviper subspecies  endemic to the Philippines.The specific name, "mcgregori", is in honor of Richard Crittenden McGregor (1871-1936), who collected the type specimen, and survived its bite.The scalation includes 21 (23) rows of dorsal scales at midbody, 170-172/173-178 (or 169-172/168-178) ventral scales in males/females, 62-66/58-60 (or 63-69/56-62) subcaudal scales in males/females, and 10-11 supralabial scales.