Types Of Grasshoppers In Illinois

Illinois’s prairies, now mostly converted to farmland, still host grasshoppers that have adapted to these open spaces. Understanding the different types of grasshoppers in Illinois can help you identify what’s hopping in your backyard or local field. These insects play a key role in the ecosystem, both as plant eaters and as food for birds and other animals.

You might see them everywhere from June through September. Some are tiny, some are quite large. A few are colorful, while others blend perfectly with dry grass. Knowing the common species makes summer walks more interesting.

Illinois has over 100 species of grasshoppers. Most belong to the family Acrididae, known as short-horned grasshoppers. They have short antennae, which is their main feature. The following groups are the ones you are most likely to encounter.

Common Field Grasshoppers

These are the typical grasshoppers you see in meadows and along roadsides. They are medium to large in size. Their color is usually brown, gray, or green to match the soil and plants.

Red-Legged Grasshopper (Melanoplus femurrubrum): This is probably the most common species in the state. It has red or pinkish lower legs. You will find it in grassy areas and gardens. It eats a wide variety of plants.
Two-Striped Grasshopper (Melanoplus bivittatus): Look for two pale yellow stripes running from its head down its back. It is a large species, often over an inch long. It prefers moist, weedy areas near ditches or crop fields.
Differential Grasshopper (Melanoplus differentialis): This is a heavy-bodied grasshopper. It has black chevron marks on its hind legs. It is common in farmlands and can become a pest in gardens. Its size makes it easy to spot.

Slant-Faced Grasshoppers

These grasshoppers have a pointed, sloping face. They are usually slender. Their color helps them hide in grass. They are less likely to be pests than the spur-throated types.

Green-Striped Grasshopper (Chortophaga viridifasciata): This species has a distinct green stripe down its back. It can be green or brown overall. It is one of the first grasshoppers to appear in spring.
Meadow Grasshopper (Chorthippus curtipennis): A small, slender grasshopper. It is common in damp meadows. Its song is a soft, buzzing sound made by rubbing its legs against its wings.

Band-Winged Grasshoppers

These are known for their colorful hind wings. When they fly, you see a flash of yellow, red, or black. The wings have dark bands. They are often called “grasshopper butterflies” because of their showy flight.

Carolina Grasshopper (Dissosteira carolina): This is a large, grayish-brown grasshopper. Its hind wings are black with a pale yellow border. It flies in a wobbly, erratic pattern. You often see it on bare dirt roads or gravel patches.
Red-Winged Grasshopper (Arphia pseudonietana): As the name says, its hind wings are bright red or orange with a black band. It is common in prairies and old fields. It makes a crackling sound when it flies.

Pygmy Grasshoppers

These are very small, about the size of a fingernail. They have a bumpy, shield-like back. They live in moist areas near streams or ponds. They are not as common as other types, but they are interesting to find.

Grouse Locust (Tetrigidae family): These are not true locusts. They are tiny and look like small stones. They can swim or hop on water. They eat algae and decaying plants.

Where To Find Grasshoppers In Illinois

You can find grasshoppers in almost any open habitat. The best places are sunny and have plenty of plants to eat. Here are the main locations.

Prairies And Grasslands

Illinois was once covered in tallgrass prairie. Remaining prairies are great for grasshoppers. Species like the red-legged and two-striped grasshoppers thrive here. The dense grass gives them cover and food.

Farm Fields And Gardens

Corn and soybean fields are home to many grasshoppers. They eat crop plants, which can cause damage. In gardens, you might see differential grasshoppers eating bean leaves or tomato plants. They are most active in mid-summer.

Roadsides And Ditches

These areas are disturbed and weedy. They attract grasshoppers that like open, sunny spots. Carolina grasshoppers love bare gravel on roadsides. You can see them sunning themselves on warm pavement.

Woodland Edges

Grasshoppers do not live deep in forests. But they are common at the edges where sunlight reaches. They feed on grasses and shrubs at the border of woods. Look for them on sunny days near tree lines.

How To Identify Grasshoppers

Identifying grasshoppers is not hard if you look at a few key features. You do not need a microscope. Just watch them closely. Here is a simple step-by-step guide.

Look at the antennae: Short antennae mean it is a short-horned grasshopper. Long, thin antennae mean it is a katydid or cricket.
Check the body shape: Slant-faced grasshoppers have a pointed head. Spur-throated ones have a rounded head.
Notice the color: Look for stripes, spots, or bright colors on the wings. Band-winged grasshoppers show color when they fly.
Measure the size: Small ones are under 1 inch. Large ones can be over 2 inches. This helps narrow down the species.
Watch the behavior: Some fly with a click. Others hop short distances. Band-winged grasshoppers fly in a zigzag pattern.

You can use a field guide or an app to confirm your guess. The iNaturalist app is good for this. Take a clear photo of the grasshopper from above and the side.

Life Cycle Of Illinois Grasshoppers

Grasshoppers go through simple metamorphosis. They do not have a caterpillar stage. They hatch from eggs as tiny nymphs. Nymphs look like adults but have no wings. They molt several times as they grow.

Most Illinois grasshoppers lay eggs in late summer or fall. The eggs are in a pod, buried in the soil. They stay there through winter. In spring, the eggs hatch. Nymphs appear in May or June. They become adults by July. Adults mate and lay eggs. Then they die with the first hard frost.

Some species have one generation per year. Others, like the green-striped grasshopper, can have two. The second generation appears in late summer. This is why you see grasshoppers until October some years.

Grasshoppers As Pests In Illinois

Most grasshoppers do not cause major problems. But some species can become pests. They eat crops and garden plants. In outbreak years, they can damage large areas. Here are the main pest species in Illinois.

Differential Grasshopper: This is the most damaging in gardens. It eats leaves, stems, and even fruits. It prefers beans, corn, and tomatoes.
Two-Striped Grasshopper: It feeds on alfalfa, clover, and soybeans. It can strip plants quickly in large numbers.
Red-Legged Grasshopper: While common, it rarely causes severe damage. It eats a mix of grasses and weeds.

If you have a grasshopper problem, you can use barriers or traps. Floating row covers protect garden plants. You can also encourage natural predators. Birds, spiders, and robber flies eat grasshoppers. A healthy yard with diverse plants helps keep them in balance.

Beneficial Roles Of Grasshoppers

Grasshoppers are not just pests. They are important for the ecosystem. They help break down plant material. Their droppings fertilize the soil. They are a key food source for many animals.

Birds like meadowlarks, bluebirds, and hawks eat grasshoppers. So do snakes, frogs, and small mammals. Even some fish eat them when they fall into water. Without grasshoppers, these animals would have less food.

Grasshoppers also help with plant diversity. They eat fast-growing weeds. This gives slower-growing wildflowers a chance. In prairies, this balance is important for keeping many plant species alive.

How To Observe Grasshoppers Safely

Watching grasshoppers is fun and easy. You do not need special gear. Just go outside on a warm, sunny day. Here are some tips for safe observation.

Wear light clothing: Grasshoppers see dark colors as threats. Light colors help you get closer.
Move slowly: Quick movements scare them. Walk slowly and stop often.
Use a net: A butterfly net is perfect. Sweep it through tall grass to catch them.
Handle gently: If you pick one up, hold it by the body, not the legs. Legs can break off easily.
Release them: After you look, let them go where you found them. They are part of the local habitat.

You can also listen for their songs. Male grasshoppers sing to attract females. The sound is made by rubbing body parts together. Each species has a unique song. Learning these sounds adds another layer to your observations.

Common Misidentifications

People often confuse grasshoppers with other insects. Here are the main ones to watch for.

Katydids: They have long, thin antennae. Grasshoppers have short antennae. Katydids are usually green and leaf-like.
Crickets: Crickets have long antennae and are usually dark. They are active at night. Grasshoppers are active during the day.
Locusts: Locusts are a type of grasshopper. But they form swarms. Illinois does not have true locust swarms. The word is often used incorrectly.

If you see an insect with long antennae, it is not a grasshopper. Use this simple rule to avoid mistakes. It makes identification much easier.

Grasshopper Conservation In Illinois

Some grasshopper species are rare in Illinois. Habitat loss is the main threat. Prairies have been plowed for farms. This reduces places for native grasshoppers to live. Conservation efforts focus on preserving prairie remnants.

You can help by planting native grasses and wildflowers. This creates habitat for grasshoppers and other insects. Avoid using broad-spectrum pesticides. They kill grasshoppers along with pests. A diverse yard supports a healthy insect population.

If you find an unusual grasshopper, record it. Take a photo and note the location. Share it with a local nature center or online database. This helps scientists track populations. Your observation could be important for conservation.

Frequently Asked Questions

What is the most common grasshopper in Illinois?

The red-legged grasshopper is the most common. You see it in fields, gardens, and roadsides all over the state.

Are there any poisonous grasshoppers in Illinois?

No, no grasshoppers in Illinois are poisonous to humans. Some can bite if handled, but it is not harmful. They are safe to observe.

How can I tell a grasshopper from a cricket?

Look at the antennae. Grasshoppers have short antennae. Crickets have long, thin ones. Grasshoppers are active during the day. Crickets are active at night.

Do grasshoppers damage gardens in Illinois?

Yes, some species like the differential grasshopper can damage gardens. They eat leaves and stems. But most species do not cause serious harm.

When is the best time to see grasshoppers in Illinois?

Late summer is the best time. July through September is when adults are most active. You can see them on warm, sunny days.

Final Thoughts On Grasshoppers In Illinois

Grasshoppers are a familiar part of Illinois summers. They are easy to find and interesting to watch. Knowing the different types of grasshoppers in Illinois helps you appreciate their role. They are not just bugs that jump away. They are survivors in a changed landscape.

Next time you walk through a field, take a moment to look. You might see a red-legged grasshopper on a leaf. Or a Carolina grasshopper flying with a flash of black. Each one has a story. By learning about them, you connect more with the natural world around you.

Keep a simple notebook or use a phone app to record what you see. Note the date, location, and color. Over time, you will see patterns. Some species appear early, others late. This makes each summer walk a little adventure. Enjoy the grasshoppers of Illinois. They are a small but lively part of our state’s wildlife.