This is how it senses its prey. On a symbolic level this indicates for those with this totem an increasing sensitivity to the auras of others. You may start seeing them soon, but you will definitely start sensing them. Trust what you feel around others, no matter how strange it may seem. Always examine some of the qualities and characteristics of the snake in general.
Snakes are carnivorous.
They swallow their prey whole. To be able to do this, their jaws will unhinge. The mouth is where we take in nutrition in the form of food. This unhinging ability of the snake reflects the increased ability for those with this totem to swallow and absorb greater amounts of nutrition for the head, i.e., knowledge. Learning opportunities, formal and informal, will surface frequently.