How can you tell if a spider is poisonous or not?

Answer 1

All spiders are poisonous. How do you think they kill their prey? However, not all are poisonous to man.If a spider bites and you aren't sure if they are poisonous do your best to kill it and take it with you to the doctors. They can identify it quickly and tell you if there is anything to worry about.

Answer 2

There is no unifying characteristic of all venomous spiders. However, the Wikipedia page on spider bites (See my reference source.) has pictures of almost every spider known to have medically significant venom. You can compare a spider to these images to determine if a particular spider might be poisonous. At the extreme, you could memorize all of these physical descriptions so that you would always know right off the bat.

Answer 3

All spiders are poisonous. Some are more poisonous than others. Mostly its the black widow of North America and the funnel web spider of Austrailia which are the deadliest. There are some others which can make you sick such as the brown recluse, however, most spiders' bite will only cause you to itch.

Answer 4

They are all poisonous .....some more so than others that's how they feed if you are so afraid .........leave them be ,they are most beneficial to the environment, in/on an acre of land there are almost a million spiders most are so small you'd never see them but they are there doing what they're suppose to do

Answer 5

There's no one characteristic that all poisonous spiders have (other than poison!)

Answer 6

All spiders are poisonous. Not all of them are deadly.

Answer 7

all spiders are poisonous

Answer 8

You can't, simply by looking at it. Just like snakes. You either learn to recognize dangerous species or you leave them all alone.

Answer 9

Its color... although i never look close
enough to spiders to see what color
they are im terrified

Answer 10

Look it up on the internet. Til then leave it alone.