lice eat dead skin in your hair/head but i don't know why.
No
Yes, they do eat their kind.
they feed on blood
head lice
The right answer is no. Lice eggs are white. They eat your hair and make you scratch your head.
spiders and birds
No they are only a pest
yes
No they only eat aphids.
Head lice eat blood from attaching themselves to someone's head. Each only needs a small amount of blood to survive though.
NO! they are not like the eat your hair. because then baby ladybugs will come out your hair