Field Guide

Land Invertebrates

Showing 51 - 60 of 115 results
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 female and male European earwig on a dead leaf.
Earwigs
Forficula auricularia, Euborellia anulipes, and others.
Earwigs have smooth, slender, flattened bodies that are perfect for living under rocks, leaves, and tree bark. Their pincers can repel insect predators, but they are harmless to people.
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 wolf spider with young
Wolf Spiders
Nearly 250 species in North America north of Mexico
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).
Photo of a dark fishing spider standing on a rubber tire.
Dark Fishing Spider
Dolomedes tenebrosus
The dark fishing spider often evokes alarm because of its large size. This mottled black and brown spider is often misidentified. It is not always found near permanent water.
Photo of a nursery web spider on a plant
Nursery Web Spiders
Pisaurina spp.
Nursery web spiders build silken tents in plants to protect their egg sacs, then stand guard until the hatchlings are ready to disperse. Large and velvety, nursery web spiders have long legs and variable color patterns.
Photo of a furrow orbweaver hanging head down with a green background
Furrow Orbweavers
Larinioides spp.
Furrow orbweavers have a distinctive dark pattern on the abdomen that resembles a furrow. These harmless spiders are common under the eaves of homes and near porch lights.
Photo of a female scorpionfly perched on a leaf.
Common Scorpionflies
Panorpa spp.
Male scorpionflies will make you look twice, because the abdomen is tipped with what looks like a scorpion stinger! These nifty insects cannot sting, however.
image of greenbottle fly on carcass
Blow Flies (Bottle Flies)
About 84 species in North America.
Many blow flies are so shiny and colorful they’re called greenbottles and bluebottles. But pretty as they are, it’s hard not to be repulsed by their larval diets.
image of a Stilt-Legged Fly on a leaf
Stilt-Legged Flies
About 30 species in North America north of Mexico
Stilt-legged flies are a family of true flies. They are harmless, but most species resemble ichneumon wasps or ants. The middle and back pairs of legs are exceptionally long and thin, while the front pair of legs are much shorter.
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.