I am afraid of spiders (my wife considers this a great joke) but I have no corresponding fear of daddy-longlegs. There is no contradiction in this for harvestmen, despite their eight legs, are not spiders; they are more closely related to ticks and mites. Three of their differences from spiders: their two eyes versus the spiders' six or eight; their waistless body ã head, thorax and abdomen a single unit ã and their lack of poison. An old wives tale has it that the daddy longlegs is extremely poisonous but that we are safe because it has not the power in its jaws to bite through our skin. They are not poisonous.