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"The majority of bites that do occur are not serious.

People either recover with no intervention at all, or they go to the hospital and are treated and then are fine." In 2013, there were 1,866 black widow bites reported to the American Association of Poison Control Centers, but as Scott pointed out, only 14 of these envenomations resulted in severe symptoms. In fact, not all bites from a black widow spider result in envenomation.

The spiders' venomous bites can kill a mosquito, fly, caterpillar or even a grasshopper. While these spiders' bites can cause fatalities in humans, they rarely do, according to the National Institutes of Health, which states that fatalities from black widow bites typically occur among young children, the elderly and those who are extremely ill.

"Yes, black widows are venomous, but they pose very little danger to humans," Scott said.

"Spiders communicate with each other using vibrations and chemicals called pheromones," Scott said. Black widow females put pheromones on their silk, which is attractive to males.

It's [like] a scent-based personal ad — he can tell if she's mated before, if she's hungry." And despite what her name suggests, the female black widow doesn't always dispose of her mate after copulation, Scott explained.

In fact, you really have to pinch a western black widow to get it to sink its teeth in, said Scott, who referenced a recent study that found that this species of spider is most likely to bite when it's pinched along the entire length of its body (something that might happen if it is attacked by a predator or sat upon by an unsuspecting human).

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The same study that found black widows tend to reserve bites for extreme threats also found that black widows' bites are usually venomous only when the spiders feel their lives are in imminent danger.These spiders are a common sight in vineyards, where they typically build their large, tangled webs near grape plants, Scott told Live Science.

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