Hairy, scary and lethal: how dangerous are Britain's household spiders?

There have been lots of stories about deadly spiders invading the UK, but the arachnids we're most likely to meet won't bite. So what should we look out for?Spiders are in the news again. It happens this time every year. Why? Because now is the time for spiders, in their more-or-less annual life cycle, to reach maturity - in other words, their maximum adult size. And yes, some of them can seem very big. They especially grow large when they have had plenty to eat and, being insect predators, they have grown fat on the full and wholesome menu of all those flies and bugs that nice, warm, sunny 2014 has delivered in such abundance.First, a key fact: all spiders are venomous. That's how they catch their insect prey, by injecting venom down hollow fangs into their struggling victims. But they don't really bite humans. We are much too big and taste foul. Think about it. The largest garden spider, seemingly the size of a ping-pong ball hanging ponderously in its web, just cannot get its delicate jaws open wide enough to bite even the daintiest finger. It would be like a human vainly trying to bite a giant pumpkin. Of Britain's 600 different spider species, just half-a-dozen can open their mouths wide enough, and have fangs long enough to deliver a venomous nip. Despite tabloid horror headlines, it feels like a wasp sting. Even a mild cat scratch can become infected and ooze pus. Deaths from spider bites still hover around the zero mark. Continue reading...