There are nearly 3,000 spider species in North America alone, making identifying a common house spider difficult. Is it just a harmless little guy? Or a venomous predator waiting to pounce?

It's no wonder wolf spiders are considered the stuff that fuels nightmares and unwelcome house guests ... have little in ...

From the innocent daddy longlegs to the harmful brown recluse, here are the most common house spiders, how to identify them, and when to worry about a bite, according to entomologists.