C. h. monticollaris is diurnal and highly active.
It has a very nasty temper and will strike repeatedly if molested.
It never appreciates captivity and will resist capture with utmost tenacity until helplessly overpowered.
Its bites are often very damaging due to its inward pointing teeth.

A 1 metre (3.3 ft) male specimen caught in Maharashtra, India (near Paud 09/16/13) whipped its tail when agitated.
 The same specimen was easily handled and carried around the collector's neck without incident.
C. h. monticollaris is diurnal and highly active. It has a very nasty temper and will strike repeatedly if molested. It never appreciates captivity and will resist capture with utmost tenacity until helplessly overpowered. Its bites are often very damaging due to its inward pointing teeth.
A 1 metre (3.3 ft) male specimen caught in Maharashtra, India (near Paud 09/16/13) whipped its tail when agitated.  The same specimen was easily handled and carried around the collector's neck without incident.
Coelognathus helena monticollaris