Which Spiders Are Venomous and Which Are Not
There are a number of spiders that can be dangerous to humans. Some of these spiders are venomous and others are not. The venom of some spiders is poisonous and can cause a number of side effects to people. However, the majority of spiders are not harmful to humans.
Venomous spiders are active and use a toxic chemical to subdue their prey. These spiders inject their venom on their prey, usually insects. If the venom is not diluted by the human body, it can kill the prey and leave a severe necrotic wound on the body.
A number of spiders are not venomous, including the hobo spider, black widow and hourglass spiders. Although these spiders are not known to harm humans, they can still bite and cause localized pain.
Venomous spiders are more likely to bite humans than non-venomous spiders. In fact, there are only a small number of venomous spiders that can actually kill a human. While most Australian spiders are venomous, there are some that do not.
The most common spiders that bite humans are the brown recluse and the black widow. Both of these spiders have venom glands, though their fangs are too small to penetrate human skin. This is because the glands are fused with the jaw base, which gives the fangs a very narrow gape.
Daddy-long-legs spiders also have venom glands, but their fangs cannot penetrate the skin of a human. These spiders are dangerous, but not as deadly as the brown recluse.