Why do snakes flick their tongues?

Описание: Why do snakes flick out their tongues?
Snakes are curious and are often seen flicking out their tongues to get a better sense of their surroundings by "tasting" the air. If you encounter a snake and it starts flicking its tongue in your direction, it’s only trying to figure out what you are, so give the snake plenty of space and appreciate its unique adaptations.

Snake ID photos: flickr.com/photos/myfwcmedia/albums/72157628811561507

FWC video, Andy Wraithmell and Avery Bristol

*Nat sound and music. No voice over.