Field Guide

Land Invertebrates

Showing 1 - 10 of 17 results
image of Bee Fly on leaf
Bee Flies
About 800 species in North America
Resembling bees, or sometimes big, fuzzy mosquitoes, bee flies are a family of true flies and are not bees at all. Lacking the ability to sting, their bee mimicry helps them avoid many would-be predators.
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.
Image of a female Argiope garden spider.
Black-and-Yellow Garden Spider
Argiope aurantia
The black-and-yellow garden spider is large but harmless. It sets up large, circular webs in gardens and grasslands. Lucky gardeners can host this remarkable pest exterminator all season long.
image of Paper Wasp on flowers
Paper Wasps
Polistes spp.
Paper wasps are the most familiar of Missouri's social wasps. A late summer nest bristling with dozens of wasps can be an impressive sight. If you have a garden, however, these wasps are your friends.
image of Assassin Bug crawling on a leaf
Assassin Bugs
Nearly 200 species in North America north of Mexico
Assassin bugs are usually black or brown, with an elongated head bearing a single, clawlike tube used for piercing and injecting venom into their prey. They are common in Missouri.
image of an Ichneumon Wasp on tree trunk
Ichneumon Wasps
More than 5,000 species in North America
Most ichneumon wasps are harmless, although the long ovipositor of the female is intimidating. Their larvae live as parasites inside caterpillars and other larval insects.
image of Fiery Searcher on dead leaves
Ground Beetles (Carabids)
About 2,400 species in North America north of Mexico
Ground beetles are a family of mostly nocturnal or light-shunning beetles that tend to be shiny black and have grooved wing covers. This group also includes tiger beetles, however, which includes many colorful daytime fliers.
Red milkweed beetle eating a common milkweed leaf.
Longhorned Beetles (Borers; Sawyer Beetles)
About 1,000 species in North America north of Mexico
Longhorned beetles are elongated and cylindrical, with antennae that are at least half the length of the body — sometimes much longer. The larvae are grubs that bore in wood or other plants. Some are serious pests.
Glossy black spider wasp manipulating paralyzed spider
Spider Wasps
About 300 species in North America north of Mexico
People notice spider wasps when they notice a female lugging a captured spider to its doom. In most cases, she will drag the spider into a burrow, lay an egg on the spider, and then hunt for more spiders!
image of Black-and-Yellow Mud Dauber
Mud Daubers
Three genera: Sceliphron, Trypoxylon, and Chalybion
Mud daubers are among the most familiar solitary wasps. They belong to a number of related groups, but we call them all "mud daubers" because they all build their nests out of mud. One way to tell the different mud daubers apart is by the distinctive architecture they use.
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.