Field Guide

Land Invertebrates

Showing 1 - 5 of 5 results
Image of a giant red-headed centipede.
Giant Redheaded Centipede
Scolopendra heros
The bright colors of the giant redheaded centipede have a message for you: Handle with great care! It’s of the few centipedes in our state capable of inflicting a painful, venomous bite.
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 a Wheel Bug, Side View
Wheel Bug
Arilus cristatus
The wheel bug is a large gray or brown insect that carries something interesting on its back: Is it a cog, or a wheel, or a circular saw blade?
Image of a black widow
Black Widow Spiders
Latrodectus mactans and Latrodectus variolus
The glossy, black-bodied female black widow spider has distinctive red spots on the underside of the abdomen. Only the female can inflict a potentially dangerous bite. The small, seldom-seen male is harmless.
Orange assassin bug walking on tree bark at Mint Spring
Orange Assassin Bug
Pselliopus barberi
The orange assassin bug, Pselliopus barberi, is about ½ inch long and is one of our most attractive non-butterfly insects. They overwinter in groups as adults under loose bark.
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.