4 Legged Insects: Do Insects With 4 Legs Exist?

These are insects that appear to have 4 legs.

According to the biological definition, insects have 3 pairs of legs or 6 legs in total.

There are, however, insects and other arthropods that have modified their legs for other purposes, such as predation, burrowing, jumping, and sensing.

They appear to have 4 legs, but in reality, they have 6.

So if you want to know all about insects with 4 legs, then this article is for you.

Let’s jump right in!

Table of Contents

Are There Any Insects With 4 Legs?

To be called an “insect,” a living creature, should have five basic characteristics:

  1. The body is divided into three regions: head, thorax, and abdomen.
  2. Six (6) legs are attached to the thoracic region. I repeat, 6 legs.
  3. There are two pairs of wings. 
  4. It has compound eyes.
  5. Generally, there is at least one pair of antennae.

But aren’t you stunned to hear that some insects can be four-legged?

Before getting into details, let’s make two things very clear:

  • The first one is, “All insects are arthropods, but all arthropods are not insects.”
  • Secondly, an arthropod leg is a jointed appendage used for walking, crawling, or supporting the body while standing. Modified legs are not legs.

Keeping the above clarifications in mind, we can conclude that various insects and other arthropods have a reduced number of legs. 

Here, in this discussion, we will be addressing arthropods with 4 legs. 

The representative examples of 4-legged insects will be presented within the greater discussion below: four-legged arthropods.

How Many Legs Have Insects per Definition?

The bottom line is that according to the true biological definition, insects have 3 pairs of legs. 

But there are insects and other arthropods which have modified their front or hind legs for other purposes such as predation, holding, burrowing, jumping, and sensing. 

Therefore according to our definition of the leg—”an appendage used for walking, crawling, and support to the trunk”—these modified structures are not considered legs. 

However, these modifications are of great evolutionary importance because the number of legs a creature has is being reduced in arthropods, and these appendages are used for other important functions. 

According to Ramin Amirmardfar, four-legged arthropods will increase in the future as well as the two-legged arthropods. 

This is a great demonstration of adaptation and evolution. 

Here are some examples of the 4-legged arthropods: 

#1 Mantis

Green praying mantis on a branch.

Mantises are an order of insects that have forelegs modified for hunting, also called raptorial legs. 

Mantises are ambush predators. They wait for their prey and then catch and hold their prey with the help of these spiked, long, modified legs. 

In the condition of a direct predatory threat, the mantises raise their raptorial legs along with wings, which can be perceived as a greater threat by their enemy. 

There are over 2400 species in this order, including: 

  • Eight spot mantis 
  • European mantis 
  • Mantid fly 
  • And other members of the family Mantispidae 

#2 Four-legged Bug

Thread legged bug (Emesinae sp.) with prey.

Stenolemoides arizonensis, a type of assassin bug, is also an insect that has modified forelegs. 

Its front legs are adapted to hold the prey to suck out the insides of its prey. 

This bug stands and walks on four legs, which qualifies it to be on our list. 

#3 Brush-Footed Butterflies

Crimson-patched longwing brush-footed butterfly.

These special butterflies, also known as four-footed butterflies, belong to the largest family of the Nymphalidae family. 

They appear with four legs because the front legs are so small that they cannot be detected. 

These tiny front structures are used for smelling by a butterfly. Examples include the glass wing butterfly and the Buckeye-butterfly.

#4 Grasshoppers and Locusts

Macro close up of a big green locust grasshopper on a wooden table.

Locusts, along with other types of grasshoppers, are included in the family Acrididae of insects. 

In this case, the hind legs of the grasshoppers are used for jumping only. They stand and walk only on two front pairs of legs. 

Moreover, the hind legs differ in anatomy and position as well. That is why the “Holy Bible” claims that the locusts and grasshoppers are four-legged insects. 

#5 Water Strider

Gerris lacustris, commonly known as the common pond skater.

Aquarius remiges, also called water striders or water skippers can walk on the surface of the water. 

Two pairs of hind legs are used to walk and run on the water surface, while the front legs are modified for prey capture. 

#6 Giant Water Beetle

Giant water bug (Lethocerus deyrollei).

Giant water bugs belong to the family Belostomatidae of insects. They live in water and use only two pairs of hind legs for swimming. 

The front legs are modified again for capturing and holding their prey. They often leave the water and fly about. They are exclusive predators and eat small fishes, crustaceans, and other insects.

#7 Cicadas

The cicadetta montana or new forest cicada on green stem, close-up.

This great group belongs to the genus Magicicada of insects and contains 7 species. Wrongly included in locusts, these insects are actually bugs. They spend about 99% of their life in an immature state called nymphs. 

During that nymph stage, they have four functional legs, and the front pair is used for burrowing and piercing into the roots of plants from where they drink the sap. 

They emerge as winged adults by digging out using their front legs near the end of their life and die soon after mating. 

#8 Octhera

Ochthera mantis, the mantis fly, is a shore fly.

This is a member of the genus of flies that have swollen raptorial forelegs. 

They use the front pair of the legs to signal, recognize, and express different behavior. 

They don’t use them for walking, crawling, or supporting the trunk of the body. So they use only 4 legs as actual legs. 

#9 Garlic Four-legged Mites

Mites belong to arachnids which usually have four pairs (8 legs). But this group of mites belongs to the superfamily Eriophyoidea which includes 7 species. 

The mature instars, or larval stage, of four-legged mites, have two pairs of legs in the front of the body and don’t have any other legs. 

They are of tiny size are parasites of garlic plants.