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Entomologist explains why you shouldn't kill spiders in your home

Entomologist explains why you shouldn't kill spiders in your home
He comes in peace. Credit: Matt Bertone, CC BY-ND

I know it may be hard to convince you, but let me try: Don't kill the next spider you see in your home.

Why? Because spiders are an important part of nature and our indoor ecosystem 鈥 as well as being fellow organisms in their own right.

People like to think of their dwellings as safely insulated from the outside world, but many types of spiders can be found inside. Some are accidentally trapped, while others are short-term visitors. Some species even enjoy the great indoors, where they happily live out their lives and make more spiders. These arachnids are usually secretive, and almost all you meet are neither aggressive nor dangerous. And they may be providing services like eating pests 鈥 some even eat other spiders.

My colleagues and I conducted a visual to inventory just which arthropods live under our roofs. Every single house we visited was home to spiders. The most common species we encountered were and .

Both build webs where they lie in wait for prey to get caught. Cellar spiders sometimes leave their webs to hunt other spiders on their turf, mimicking prey to catch their cousins for dinner.

Entomologist explains why you shouldn't kill spiders in your home
A cobweb spider dispatches some prey that got snagged in its web. Credit: Matt Bertone, CC BY-ND

Although they are generalist predators, apt to eat anything they can catch, spiders regularly capture nuisance pests and even disease-carrying insects 鈥 for example, mosquitoes. There's even a species of jumping spider that in African homes. So killing a spider doesn't just cost the arachnid its life, it may take an important predator out of your home.

It's natural to fear spiders. They have lots of legs and almost all are venomous鈥攖hough the majority of species have venom too weak to cause issues in humans, if their fangs can pierce our skin at all. Even . I know a few spider researchers who overcame their fear by observing and working with these fascinating creatures. If they can do it, so can you!

Spiders are not out to get you and actually prefer to avoid humans; we are much more dangerous to them than vice versa. are . Although there are a few medically important like and , even their bites are uncommon and rarely .

If you truly can't stand that spider in your house, apartment, garage, or wherever, instead of smashing it, try to outside. It'll find somewhere else to go, and both parties will be happier with the outcome.

But if you can stomach it, it's OK to have spiders in your home. In fact, it's normal. And frankly, even if you don't see them, they'll still be there. So consider a live-and-let-live approach to the next you encounter.

Provided by The Conversation

This article was originally published on . Read the .The Conversation

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