Why does a snake flick its tongue quite often?

Question

A pangolin can extend its long narrow tongue over half the length of its head and body; where in the body is its tongue attached?

Answer 1

When a snake flicks its tongue, it collects odors that are present in miniscule moisture particles floating through the air. ... The prongs of the forked tongue fit perfectly into the two holes in the Jacobson's organ, which is also known as the vomeronasal organ.