What is it? Do you need to do anything except jump and maybe give a little shriek? If it's a wolf spider, there's no reason for concern. That's according to Michael Thome, an associate certified ...

A wolf spider is a medium to large arachnid of the family Lycosidae, with body lengths ranging from 0.25 to 1.5 inches (0.64 to 3.81 cm), depending on the species.