Unfortunately, the spider to human – one of the worst of living creatures. However, people can’t avoid encounters with spiders. Because they are everywhere: in the woods, in the meadows, and in our homes. Wherever you are, as a rule, within a radius of meters away from you, there is at least one spider, albeit small, but predatory. After all, 38,000 species of spiders found on the ground – the predators, and some of these little predators are poisonous … Anyway, the most poisonous spider on the planet is Black Widow spider, whose venom is 15 times more potent than the venom of a rattlesnake. And without medical care a bitten person dies within a few days. Besides, poisonous Black widow spider is fatal to horses and even camels.