Grass Snake & tongue flicking

Grass Snake & tongue flicking

Observation - Grass Snake & tongue flicking - UK and Ireland. Description: 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

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.