They are not spiders but arachnids, relatives of spiders. They don't make webs, have a fused body and just one pair of eyes.
They are extremely old, fossils going back 400 million years. That is 200 million years before the dinosaurs. Believed to have split from the scorpions.
They are not poisonous, produce no venom.
They are all over the world, with over 10,000 species.
They don't do much walking. You would think the long legs had a use but Daddy Long-legs will stay in a crevice all day, come out at 7pm find a close place to sit for the night. The legs may be used as male competition for female attention.
source ... http://mentalfloss.com/article/59455/15-fascinating-facts-about-daddy-longlegs
