when he saw a woodpecker,he said...
"看见" mean saw, which means he or she saw sth and have noticed it.
"看" generally means look, watch, see, read
"见" means see
p.s, some tips, single chinese character has lots of meaning and the meaning is vague and uncertain, better not separate it to learn, for example, the word "见", when it is with other characters, like "罕见" means rarely (to see), "接见" means meet someone, "见解" means someone's view of point towards sth