What factors determine the size of a black widow spider?

As far as I know, they are genetically limited to a maximum size. If they are like other spiders there may be some that grow smaller than others. That may be due to their age and/or their sufficiency of nutrients. read more

The lethality of a black widow spider bite is dependent on several factors. These factors include the health and age of the affected individual, the gender of the spider, and the possibility that an allergy to spider bites may exist. read more

Size: Females are larger at around 1 to 1.5 inches long, the males are only about half this size. Black Widow Spider Bites: Black widow spiders are considered dangerous, although, it is rare to experience any long term complications or die from being bitten by a black widow. read more