Field Guide

The openfield orbweaver is a common nocturnal orb-weaving spider in Missouri.

The marbled orbweaver is sometimes called the “pumpkin spider” because its rounded abdomen is sometimes bright orange. The color and markings can vary greatly.

The spiny assassin bug is one of nearly 200 species of assassin bugs in North America. It walks, hops, and flies to capture its insect prey.

The pale green assassin bug, Zelus luridus, is one of nearly 200 species of assassin bugs in North America. Like other assassin bugs, it is a predator that captures and eats other insects.

Armored harvestmen have spines on their fingerlike mouthparts (pedipalps). Unlike other harvestmen, members of this suborder of so-called daddy longlegs do not usually have long legs.

The ninebark calligraphy beetle is one of nearly 40 North American calligraphy beetles, named for the scrawly markings on their backs. Most calligraphy beetles require particular host plants.

The four-humped flat-faced longhorn has no true common name, but its markings are distinctive. It plays an important role in breaking down rotten wood and enriching soils.

Mature female starbellied orbweavers spin wheel-shaped webs in prairies and other open, sunny habitats. The abdomen is decorated with a crown of spines and usually has a star pattern on the back.

Plant bugs, or mirids, are a huge family of true bugs. They are often overlooked — except by gardeners and farmers. Most mirids eat plants, and some are agricultural pests. As a group, they’re an important food source for birds and other insectivores.

Whitebanded fishing spiders are often seen on tree trunks, walls, or other vertical surfaces, sometimes far from water. The coloration and markings can vary, but many individuals have an olive-green cast that helps them blend in with mosses and lichens. Note the bristly legs.