The Crotalinae, or crotalines, are a subfamily of venomous vipers found in Asia and the Americas. They are distinguished by the presence of a heat-sensing pit organ located between the eye and the nostril on either side of the head.

The Pit Viper Expedition is held annually during the South West monsoon month of July. It targets pit viper species for data collection on habitat, taxonomy, color morphs and abundance besides collection of habitat preference data and photo documentation of other Herpetofauna. The 3 species of Pit vipers are the Hump Nosed Pit viper (Hypnale hypnale), Malabar Pit viper (Trimeresurus malabaricus) and Bamboo pit viper (Trimeresurus graminieus).

Who should join

For those who wish to undertake an adventurous trekking and survey expedition through Western Ghats canopy forests, cross the seasonal monsoon waters at picturesque locales and are game on braving high humidity and excessive rainfall, this trip is meant for you. Our expedition will take us through pristine Western Ghats forests in the states of Goa Karnataka and Maharashtra over a period of 5 days.

What we do

The team conducts opportunistic and systematic searches and surveys using state of the art field equipment alongside trained herpetologists and field experts. Our aim is be to document and collect data on the 3 target species in a span of 5 days. We also catalogue other Herpetofauna as well as other lesser-known fauna as we traverse through unchartered forests, connect with communities and help prepare a database for this region.


Essentials include physical fitness and ability to brave challenges in the South West monsoons. Basic experience in working in field conditions in forest areas and affinity for lesser-known biodiversity is an added essential.

The Region

The region encompasses the states of Goa, Karnataka and Maharashtra and is part of the Western Ghats landscape.


Team strength is restricted to 10 members only. | For details contact [email protected]