Scientist still hasn’t been able to determine the exact number of insects on our planet. But, they suspect that figure is between 1.4 and 1.8 million. This is a huge number, and many people get confused when they encounter some insects. In most cases, people are afraid of them, even though a vast majority of bugs is harmless. Of course, our planet hosts even dangerous species, which can cause you serious health problems. If you ever wondered what the most common insects in the world are, we are going to provide you the answers.


Beetles are the largest group of insects; they also have another name, Coleoptera. They make 25% of all insects in the world. You can find four different suborders, and their number counts up to 4 million. Whenever you look, you can spot beetles, except in oceans and Antarctica. Beetles have managed to adapt to many living conditions, and they invaded every corner of our planet. They are a huge part of our ecosystem and food chain. All beetles have an exoskeleton, and most of the species have armor – like shells. They still kept the characteristics most insects have, head, thorax, and abdomen.


FliesDiptera is the second largest group of insects in the world, most people know them by the name flies. These fascinating insects are everywhere, and they aren’t just house flies. This species involves dragonflies, mosquitos, butterflies, fireflies, and much more. Scientists have discovered more than 240,000 different types of flies, but only half of them are fully researched. As their names states, flies fly, the thorax holds their wings and head their antennae. These two features help the fly and coordinate through space. They have individual neurons H1 in the brain, which are responsible for flight stabilization. All the muscles are located in the thorax, and they help them control the movement through the air. The most interesting thing about flies is that they only eat liquids. They don’t possess teeth, and even when they consume food, everything is turned into liquids.

Bees and Ants

Bees and AntsThe third largest type of insects is called Hymenoptera, which involves bees, ants, wasps and sawflies. There are more than 150,000 species of these insects. Their structure is similar to flies; they can fly around because they have the same body structure as flies. Most insects of Hymenoptera feed on plants. They will lay eggs, and the hatchlings will eat their way out, growing to be stronger and larger in that process. There are 18,000 of different species of flies; this is one of the reasons why they are in third place.

Butterflies and moths

So far, there are more than 140,000 different types of butterflies and moths. Many people consider the butterflies the most beautiful insects among them all. You can find them in any part of the world, and you can recognize them by their vivid colors. They feed on plants, and you can find them in sunny places.