Field Guide

Land Invertebrates

Showing 11 - 20 of 27 results
Photo of a male Banded Pennant dragonfly
Dragonflies
Species in the suborder Anisoptera
Like damselflies, dragonflies have long bodies, two pairs of long, membranous, finely veined wings, and predaceous aquatic larvae. Dragonflies typically hold their wings stretched outward, horizontally.
Narceus Millipede crawling across gravel
Millipedes
More than 900 species in North America north of Mexico
Millipedes, which have two pairs of legs per body segment, are harmless detritus-eaters, move slowly, and curl up defensively when harassed.
Photo of a northern walkingstick on autumn dogwood leaves
Walkingsticks (Stick Insects)
Diapheromera femorata, Megaphasma denticrus, and others
Walkingsticks are long, slender insects that are perfectly camouflaged to look like brown or green twigs. Most species are tropical, but some types are found in Missouri.
Photo of mating pair of musk mares, on a gravel surface, viewed from above.
Northern Two-Striped Walkingstick (Musk Mare)
Anisomorpha ferruginea
Be careful when approaching northern two-striped walkingsticks: They can squirt an acrid fluid at you. Musk mare, devil’s riding horse, and prairie alligator are all names for this remarkable stick insect.
image of Xystodesmid Millipede crawling on a forest floor
Xystodesmid Millipedes
8 tribes, with about 23 genera, in North America north of Mexico
Millipedes in family Xystodesmidae often have bright colors that serve as a warning to potential predators that they may secrete foul or toxic substances.
Photo of a male giant stag beetle on moss
Giant Stag Beetle (Elk Stag Beetle)
Lucanus elaphus
The giant stag beetle is enormous, the males reaching 1½ inches in length without the mandibles, and nearly 2½ with them. Look for them on rotting logs in forests in early summer. They’re also attracted to lights.
Female Carolina mantis
Mantids (Mantises)
Stagomantis carolina, Mantis religiosa, and Tenodera sinensis
Most people recognize mantids, or mantises, when they see them, but it takes more practice to distinguish among the different species of these efficient insect predators.
Male eastern Hercules beetle walking in grass
Eastern Hercules Beetle
Dynastes tityus
The eastern Hercules beetle is a breathtaking animal. Like its Greek-hero namesake, it is big and strong. Males have horns; females do not. Hercules beetles are harmless to people.
Photo of a giant walkingstick
Giant Walkingstick
Megaphasma denticrus
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.
Photo of walkingsticks during outbreak
Northern Walkingstick
Diapheromera femorata
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.
See Also
Photo of a Yellow-Collared Scape Moth
Yellow-Collared Scape Moth
Cisseps fulvicollis
The yellow-collared scape moth is more often “orange-collared.” And whether you think it looks more like a firefly or a wasp, it’s still a moth!
image of Plume Moth on blade of grass
Plume Moths
Nearly 150 species in North America north of Mexico
Slim, delicate plume moths are instantly recognizable by their T-shaped silhouette, long legs, and muted shades of tan and brown. It can be hard to separate the various species.
Photo of an Isabella Tiger Moth
Isabella Tiger Moth (Woolly Bear; Woolly Worm)
Pyrrharctia isabella
Not many people know the adult Isabella tiger moth when they see one, but we’re all acquainted with its caterpillar, the woolly worm, or woolly bear.

About Land Invertebrates in Missouri

Invertebrates are animals without backbones, including earthworms, slugs, snails, and arthropods. Arthropods—invertebrates with “jointed legs” — are a group of invertebrates that includes crayfish, shrimp, millipedes, centipedes, mites, spiders, and insects. There may be as many as 10 million species of insects alive on earth today, and they probably constitute more than 90 percent all animal species.