Field Guide

The green robber fly is one of several species of robber flies called giant robber flies or bee killers. They are indeed large, with distinctive yellow and dark stripes on the abdomen and iridescent green eyes.

The Hine's emerald dragonfly is a federally endangered species. It has a dark emerald-green thorax and two yellow stripes on its sides. It lives in calcareous spring-fed marshes and sedge meadows overlaying dolomite bedrock.

The giant walkingstick is the largest insect in North America, with females up to 7 inches long. The middle and hind legs have spines. Males have a single, large spine on each hind leg.

The northern walkingstick is Missouri's most common species of walkingstick. It is perfectly camouflaged for a life in trees and shrubs. They not only look like twigs but also sway their bodies to mimic the motion of branches in a breeze.

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.

The northern crab spider has many spiny hairs covering the top surfaces of the carapace, abdomen, and legs, and it has usually has greenish-yellow or yellow-brown markings.

The fork-tailed bush katydid reaches about 1¾ inches long. It is usually leafy green and is most common in bushes, thickets, and other shrubby areas. It is most active after dusk. The call is a simple "tsip!" given every few seconds.

Mantidflies look like a cross between a lacewing insect and a praying mantis. They are small, delicate creatures with intricately veined wings, but the front half looks like a mantid, complete with raptorial forelegs.

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.

About six species of bird grasshoppers occur in Missouri. Most are attractively marked, large insects that gracefully fly from danger, almost like birds.