Coelognathus helena monticollaris is subspecies of nonvenomous constricting snake in the family Colubridae.

It never appreciates captivity and will resist capture with utmost tenacity until helplessly overpowered.

A 1 metre (3.3 ft) male specimen caught in Maharashtra, India (near Paud 09/16/13) whipped its tail when agitated.

It uses its camouflage to stalk its prey and initially disorients its victim with a blitz strike.

It may also prey upon birds, frogs, lizards and other snakes as well, but shows a high preference towards small mammals.

The smallest known specimens of C. h. monticollaris measure around 350 mm (14 in) in total length (including tail).