Are Spiders Deadly? Study Reveals Spider’s Aggressiveness

Are spiders deadly? These pests are one of the oldest, living for about 300 years, it got to some point the early men had been seen using its venom to heal certain ailments.

However, that does not answer if they are poisonous or not. Time and climate gradual change has brought about some uncertainties that the spiders might have become deadly.

In this article, everything you need to know about the aggressive behaviors of spiders is discussed. Not only finding out if they are deadly, but we also have some listed down species of spiders that are deadly.


Are Spiders Aggressive?

Spiders can be one of the most loveable creatures if we get to know them. Due to our reaction to seeing them at first sight, we panic and that panic may seem like a threat to them.

Spiders go around doing their work and home routine, like eating, mating, hunting, and having fun.

Over the years, the early man was seen to be friendly with spiders, as they served medicinal purposes in many areas.

So, it was a win on the side of the spiders as they benefited from the droppings of human feed. To some point, the spiders evolved, so did man, and now there are ways of dealing with a spider infestation.

Spiders tend to be aggressive, only with specific and strong reasons for this aggressive nature. So you have to try not to get in their path as they take no threat lightly especially to some species of spiders.


Are Spiders Deadly
Brown Recluse Spider


What makes Spiders Aggressive?

Now, we have it that spiders can be aggressive. But what really makes these guys aggressive? Spiders unlike other animals in the universe only react when threatened or when you try getting rid of them.

Spiders also show this behavior not only to humans but other animals who get in their nests. As they do this to protect their young ones, so is it with other pests.

We as humans also act aggressively when threatened or disturbed. Below are certain things you should note that makes spiders aggressive;

  • When they are threatened, they tend to react aggressively.
  • When their colony or a member of their colony is killed.
  • When they are pursued from their home.
  • When their nest is being tempered or destroyed.

Above is a list of four(4) basic activities that make the spider act aggressively. Now to the reason that brought you here. As you have reached the point at which your answer is answered in brief and clear explanation.

Note: As a result of this aggressiveness, the spiders may result to being deadly and dangerous to man and his habitats, even to your pet.

So to some point, it is not safe to have them around as they can and cannot be harmful. Now to answering your question ” Are spiders deadly?”


Are Spiders Deadly?

Now to your answer. After reading through this interesting right up on “are spiders deadly?”, you must have seen points that have made you think that they are not deadly, but how sure are you that you thought right.

Well, your answer spiders being deadly is not certain as they are different species that can be seen to be deadly while they are others who are not. So when deciding whether they are deadly, we should first identify the species or phylum they belong to.

So in other to aid this research, we have in stock for you a list of spider species that are deadly to humans and pets.


What Spider Species are Deadly?

There are about 43,000 species of spiders in the world, which a study shows us that about 9 are deadly, and the rest seem to be less harmful compared to the other nine(9).

Below are the nine world’s most famous species of spiders that are deadly, and as a result of these, if you come in contact with them, try to stay away from them. They are:

  • Brown Recluse Spider, botanically known as Loxosceles reclusa.
  • Brazillian wandering spiders, botanically known as Phoneutria fera and P. nigriventer.
  • Yellow sac spiders, botanically known as Cheiracanthium inclusum.
  • Wolf spider belong to the family Lycosidae.
  • Black Widow Spider, botanically known as Latrodectus mactans.
  • Brown Widow Spider, botanically known as Latrodectus geometricus.
  • Red Widow Spider, botanically known as Latrodectus bishopi.
  • Redback Spider, botanically known as Latrodectus hasselti.
  • Funnel-web Spiders belong to the family Dipluridae.



Having explored this interesting article on “are spiders deadly?” we @pestclue hope that we have given you the best to your test on this interesting write-up, as we have gathered enough evidence through series of research to give you the right and current answer to this your query.

Don’t fail to contact us on topics and facts that trouble you concerning spiders, and feel free to bring in your contribution and comment as it will help in serving you better.

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