tweeter's picture

Grass Snake & tongue flicking

Observed: 22nd March 2011 By: tweeter
S159 Neighbourhood Nature - course complete
tweeter’s reputation in Amphibians and Reptiles

As I got closer to take this photo the snake ( 1 of 4)was flicking it's tongue in and out. I understand this is how they extend their sense of smell. The tongue tip picking up the scent molecules which it then processes once the tongue is pulled back into its mouth.

Species interactions

No interactions present.


anonymous spotter's picture

You're right -

the tongue picks up scent molecules and transfers them to sensors in the mouth (the Jacobson's Organ). The tongue is forked so that, by comparing concentrations of scent, the snake can estimate where the source is.