Hello. I've found that these spiders have moved into my home recently and are multiplying like mad. they are very small, red, have a big bum and curl up in a ball on contact. they have millions of tiny babies in small round sacs too. im concerned as i have small children, are they dangerous?
These could be red house spiders (Nesticodes rufipes); they are in the same family (Theridiidae) as the redback spider, but do not appear to be dangerous to humans. See http://tinyurl.com/4brpfnj
