Spiders sport four pairs of eyes -- Spiders dance to attract mates -- Mothers give spiderlings piggyback rides -- Spiders attack with poisonous fangs -- Spiders weave vibrating funnel webs -- Spiders ambush their prey -- Spiders perform pest control and inspire scientists -- Spiders gobble bats, birds, and more -- Spiders have happy faces on their bellies -- Diving bell spiders come up for air once a day -- Gigantic spiders are the size of plates-- Spiders make fascinating pets -- Fact sheet.