How long do spiders live after laying there egg sack?

Question

How long do spiders live after laying there egg sack?
my sister has a rely cool pet wolf spider
thats been a pet all summer and it laid its egg sack
then like a week later it ran away yesterday
in the middle of the nite then cam back last nite
why wood it leave and then come back?
and wen she lade the egg sack it had 1 big egg in it and now
its multiplied in to a bunch of little eggs and its still multiplieng
do all spider egg sacks do that?
and how can you tel if the egg sack is fertile?

Answer 1

Very neat! Wolf spiders live a long time after laying the sac - in fact as a group, wolf spiders are noted for carrying the sac around with them (generally attached to their back end) and then when the babies hatch out, they ride on the mother for a while until they're big enough to fend for themselves. I don't know why she would leave then come back, but the 'multiplying' of the eggs is more apparent than real - she laid all the eggs before she closed up the sac. Either the eggs have somehow gotten larger, the sac has shrunk to show the individual lumps, or the spiderlings are hatching. I'm not sure which is more likely, to be honest - I've never raised wolf spiderlings; should be interesting!

Answer 2

"Mother" spiders aren't mothers -- they just lay the eggs, then die. They don't take care of the babies. The babies, when they first hatch, eat each other. There may be 200-300 spiders in the egg sack, but only 3 or 4 will live to grow up. You need to do nothing. They will live as eggs through the winter, then hatch next srping. If you don't want spiders, pull the leaf and put it in the trash. By the way, spiders that live on trees and bushes like that are NOT poisonous. Frankly, it sound like a common Orb Web spider.