Field Guide

Silverfish are known worldwide, since they commonly live in our homes. There are a number of species in this family of insects, including the common silverfish and the firebrat.

The brown recluse is a spider whose venomous bite may be medically significant to humans, though a bite is almost never fatal. Brown recluses are most commonly encountered in houses, where they occupy little-used drawers, closets, and other small hiding spaces.

The glossy, black-bodied female black widow spider has distinctive red spots on the underside of the abdomen. Only the female can inflict a potentially dangerous bite. The small, seldom-seen male is harmless.

A wolf spider doesn't spin webs to catch its prey — it runs it down like a wolf! Spiders in this family have long legs and are usually gray, brown, black, or tan with dark brown or black body markings (especially stripes).

The bold jumper, or white-spotted jumping spider, is fuzzy, makes jerky movements, jumps surprisingly long distances, and doesn't build webs. It usually has a black body with white, orange, or reddish spots on the abdomen.

Daddy longlegs, or harvestmen, are familiar Missouri animals. They are not spiders, but opilionids. Unlike spiders, they have a fused body form and lack silk and venom glands.

The filmy dome spider is one of the most abundant woodland spiders in Missouri. Although the spider is tiny, its snare web, which looks like an upside-down silk bowl, is conspicuous throughout the year.

The color pattern can vary, but the ten-spined, chunky abdomen sets the female spined micrathena apart from all other spiders.