Trimeresurus malcolmi is a venomous pitviper species[4] found in East Malaysia.

[7] The specific name, malcolmi, is in honor of British herpetologist Malcolm Arthur Smith.

It can also wiggle it's tail back and forth when threatened.

[7] Found in East Malaysia at 1,000-1,600 m elevation (3,280-5,250 feet).

The type locality given is "Sungii River, near Bundutuan, Mount Kinabalu, British North Borneo Sabah, at an altitude circa 3,000 feet [914 m]".