14 Types of Insects That Start With J

Insects That Start With J
Photo by Oktavianus Mulyadi on Pexels

The animal kingdom is a group of animals that includes insects. Insects are believed to be living organisms, and each species of insect has a biology and behavior that is completely unique to itself.

They have developed their own unique sensory capacities, modes of communication, and reproductive strategies. But what are the insects that start with J?

They are also in danger due to human activities, including the destruction of their habitat, the pollution of their surroundings, and shifts in the climate.

Learning about insects whose names start with the letter J can give us a fresh viewpoint on the natural world and encourage us to respect and value the many different forms of life that can be found in it.

Let us get this party started!

1. Jack Pine Budworm

Jack pine budworm is first on our list of insects that start with J. It is a kind of moth that is responsible for causing extensive damage to trees that yield cones. 

The larvae of this insect feed on the tree’s buds, shoots, and needles, ultimately destroying most of the tree’s foliage.

This results in the death of trees, which is especially problematic in dense forests with the potential for population explosions.

Monitoring population levels and employing either chemical insecticides or biological control strategies are the two main components of this pest’s management.

2. Jack Pine Sawfly

“The Jack Pine Sawfly is also one of the insects that start with J, which consumes the needles of the Jack Pine tree.

This tree is native to the western United States. The larvae of this sawfly are capable of stripping the leaves from entire trees, which might result in the plants being debilitated or even dying. 

Insecticides and parasitic wasps can also be used in conjunction with hand extermination of larvae as one method of population control.

On the other hand, Sawfly populations can be kept under check in part by natural predators.

3. Jewel Weevil

Jewel Weevil
by Judy Gallagher is licensed under CC BY 2.0

The Jewel Weevil is one of the insects that start with J, originally from countries located in Central America, but in 2002, it was first spotted in Florida.

It was first discovered at a plant nursery specializing in ornamental plants, and then the following year, it was found in a shipment of bananas. 

Since then, both the number of sightings and their frequency have increased.

At this time, the species has become well established in the counties of Miami-Dade and Broward in the state of Florida. 

The possum grape vine, also known as the princess vine, is the plant that serves as their favorite host.

It is not known at this time whether or not this bug will threaten other vine plants, such as grapevines planted in Florida.

Since there are currently no known biological controls for the Jewel Weevil, further research is required in both of these areas.

4. Joro Spider

Joro Spider
by Wedontneedfeatherstofly is licensed under CC BY 2.0

The Joro Spider, which is native to eastern Asia, was discovered for the first time in Georgia in the year 2014.

The Joro Spider is frequently compared to banana spiders due to similarities in size, coloration, and uniqueness. 

The spider is enormous enough to fill the palm of an adult’s hand (it may reach a width of up to 76 millimeters or 3 inches), and its coloration is striking to the human eye.

Its long, slender legs contain large bands of black and yellow, and its belly is covered in bright yellow and blue-gray stripes. 

The Joro Spider does not pose a threat to human beings.

It is capable of biting and has venom, but unless the person being bitten has an allergy to this particular species, it is not dangerous.

It is not known to be violent and can be scared away by loud noises.

Entomologists are in agreement that it will remain on the continent despite the fact that it is only a recent arrival.

5. Japygid Dipluran

These insects that start with J, known as diplurans, are incredibly tiny in size.

They appear to be a Silverfish crossed with a naiad, a member of the dragonfly family.

They are incredibly slim and have two long tails that branch from the tip of the abdomen, similar to the way silverfish have three prongs on their tail. 

They are available in a wide range of hues. Nymphs are much smaller copies of adults; unlike adults, they do not have eyes, scales, or a mouth that can be seen. 

Both adults and juveniles can be discovered hiding in caves, under leaf litter, stones, boulders, downed trees, logs, or stones and stones.

Because of their diminutive size and unassuming look, it is very unusual to find one in its natural habitat.

6. Japanese Beetle

Japanese Beetle
by Judy Gallagher is licensed under CC BY 2.0

The Japanese beetle is a species that has become very invasive in North America and has the potential to cause severe damage to more than 300 different plant types.

These insects that start with J get their nutrition as adults from eating leaves and flowers, but their larvae eat grass roots. 

It is possible to keep this pest under control by employing insecticides, parasitic nematodes, and pheromone traps; nevertheless, complete eradication is extremely unlikely due to the pest’s adaptability and varied host preferences.

7. Japanese Broad-Winged Katydid

A remarkable species of katydid known as the Japanese Broad-winged Katydid can be found only in the Japanese archipelago.

This particular katydid is a pro when it comes to hiding, as seen by its recognizable broad wings that are shaped like leaves. 

These insects that start with J consume a wide variety of plant species, although it doesn’t threaten agricultural crops much.

It is not considered to be a nuisance; however, many people keep them as pets or collect them for scientific studies.

8. Japanese Grasshopper

“The Japanese Grasshopper is also one of the insects that start with J and is found in large numbers across Japan.

It feeds on a wide variety of plants, including rice and soybean crops, among others. 

Adults of this species are normally green or brown in color. However, the nymphs of this species are frequently brilliantly colored.

Farmers either plant crops that grasshoppers favor less or treat their fields with insecticides in order to reduce the number of grasshopper infestations.

9. Jeffrey Pine Beetle

The Jeffrey Pine Beetle is a bark beetle species indigenous to the mountainous regions of western North America.

Its larvae eat away at the bark of Jeffrey Pine trees, ultimately resulting in their demise.

The removal of infested trees and the application of pesticide treatments in high-risk regions are both necessary steps in the management of these insects that start with J.

10. Jerusalem Cricket

Jerusalem Cricket
by entogirl is licensed under CC BY 2.0

The Jerusalem Cricket is a big bug that does not possess wings and can be found throughout western North America.

This particular cricket consumes plant and animal matter for food, enabling it to play a vital role as a decomposer in the ecosystem in which it lives.

It is commonly referred to as a “potato bug.” The Jerusalem Cricket is not considered to be a pest, but because of its large size and unpredictable appearance, it can be a problem in metropolitan settings.

11. Juniper Midge

The Juniper Midge is a very little insect that consumes the sap of juniper plants for food.

Its larvae are responsible for the development of blister-like galls on the stems and leaves of the tree, which might ultimately result in the death of the tree. 

It is possible to control these insects that start with J with the application of insecticides, pruning techniques, and fertilizer application; nevertheless, early discovery is essential to avoid serious infestations.

12. Juniper Scale

The Juniper Scale is one of the tiny insects that start with J that feeds on juniper trees by sucking the sap out of their bark.

Trees that have been infected by a disease become discolored and lose their leaves, resulting in the tree’s death. 

Insecticides or other forms of biological control may be utilized in the management of these insects that start with J; however, ensuring that plants receive adequate nutrition and that trees are properly maintained may also be helpful in preventing infestations.

13. Juniper Tip Midge

The Juniper Tip Midge is a tiny fly that feeds on juniper trees, which ultimately results in the juniper tree losing its tips.

This insect is notoriously difficult to eradicate because of its size and position within the tree.

The discharge of parasitic wasps, for example, is one example of an efficient biological management strategy that can be used to reduce populations of these insects that start with J.

14. Juniper Webworm

The Juniper Webworm is last on our list of insects that start with J.

It is a tiny caterpillar that spins silken webs around the tops of juniper branches, which can lead to tip dieback and contribute to an ugly appearance.

The removal of affected branches, as well as the application of pesticides or other forms of biological control, are necessary steps in the management of this pest.


Insects are necessary for maintaining ecological harmony for a number of reasons, including the fact that they pollinate plants and provide a crucial food supply for a great deal of wildlife.

Despite the fact that they are frequently labeled as pests, they are essential to the process of keeping our ecosystems healthy.

It is imperative that these insects that start with J be guarded and preserved so that future generations can enjoy living on a healthy planet.

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