Are all spiders and snakes poisonous?

Answer 1

No. The only poisonous watersnake in North America is the cottonmouth, otherwise known as the water moccasin.

Ok. Not only are cottonmouths not poisonous, they are also nowhere near the only venomous snake in North America. There are lots and lots of venomous snakes in North America. To answer the ask: no, water snakes are not poisonous and they are not venomous either.

Edit from Drake Tinker:

The north American cottonmouth or water moccasin IS poisonous. The snake is a semi-aquatic pit viper usually found near streams and slow-moving water locations, the snake is able to swim quite well, though and has managed to colonize many small islands along the south eastern coast of the United States and the Gulf of Mexico by swimming to the nearby islands.

They are not generally deadly, but because their venom is cytotoxic(meaning it destroys cells) which destroys tissue, they are a risk. An envenomed bite could cause severe tissue destruction which will leave large scars, and can sometimes require amputation - but that is rare. The venom does NOT contain neurotoxin like most American pit vipers, which reduces their deadliness.

When threatened or stressed, they usually coil themselves up with the head in the center of the coil, and display an open mouth which is very white, and how they got the name 'cottonmouth'. The tip of the tail will also often shake, even though they have no rattles to make noise. Young snakes are banded much like rattlesnakes, but as they age the bands darken, eventually becoming very hard to see, except near the edges of the snakes' belly. It should be noted that younger poisonous snakes generally have a much more potent venom and are also more likely to bite and use venom when attacking.

Answer 2

Yes. The terms venomous and poisonous are often misused. Venom is injected or absorbed, poison is ingested or eaten. People quite often eat snake-meat that's come from a venomous species - without suffering any harmful effects. Venom is stored in sacs - contained within the head - not spread throughout the body tissue.

Answer 3

Every single spider is venomous. They need venom to help breakdown the organs in their prey. Some are quite more potent then others. For example a jumping spider and a black widow. A jumping spider bites you no harm will be done. But if a black widow gets ahold of you, that can cause immediate damage.

Not all snakes are poisonous. Some use venom to easily kill prey and to defend itself. Others bite and wrap around the prey to attempt to strangle and break bones An easy way to tell if a snake is poisonous is by looking the slant of the eyes. Round is not venomous, but if it has that evil slant watch your feet.

Answer 4

yes