Insects are anthropods (Phylum that encompasses invertebrate living beings (Without bone structure) and with articulated appendages), with articulated limbs in many of its points and a body segmented into 3 parts, head, thorax and abdomen. The word insect finds its etymology from Latin, which means cut off.

Insect characteristics

All insects have a pair of before, three pairs of legs and can have up to two pairs of wings, although not necessarily. They are commonly small living beings. Insects are the largest animal group on earth, with up to one million different species estimated.

They fulfill a truly important function in the ecosystem, since they are the main hunters of other invertebrates, thus controlling the pests that could form. They also have a very important role in the pollination of plants, mainly bees, they ensure that pollen can germinate and eliminate a large part of organic matter, although they are also capable of creating great damage to crops, since they can destroy a third of plantations rapidly and are spreaders of diseases that mainly affect humans.

Bee (insect) extracting nectar from a flower

Bee (insect) extracting nectar from a flower

Groups of insects

We can divide insects into 8 large common groups.


Odonata insects have a broad head and a stretched abdomen, 4 membrane wings that cannot be stored in the abdomen, an example is dragonflies.


The dichotomous insects have antennae with many joints, vertical head (hypognata) with the teeth inwards, the most common of these insects are cockroaches, termites and praying mantises.


The dermaptera at its posterior end have tweezers and are elongated and generally flat, like the scissor or the cutter.


Orthoptera are hypognant-headed, with great mobility in the prothorax and their antennae are between their eyes. Grasshoppers, crickets, and scorpions are the most common.


Diptera have two membranous wings instead of 4, their wings are called halteres, they are wings that allow them to direct flight in any direction easily. The most common are mosquitoes and flies.


Coleoptera's mouth allows them to chew and they can live in any type of habitat, with a hard exoskeleton. The most common are beetles.


Lepidopteran insects undergo metamorphosis, they are generally flying insects. There are diurnal (Butterflies) and nocturnal (Moths).


Hymenopterans have two pairs of membranous wings, the females have a structure to deposit eggs at the end of their abdomen. The most common insects are the wasp, the bee and the ant.

Insect feeding

We can divide them by their eating habit: detrivores, herbivores, carnivores u omnivores.


They are those that feed on decomposing organic materials, litter, carrion and manure.


The vast majority of this type of animal feed on plant tissue.


They use live animals as a food source divided into two categories: Predators and parasites.


They are generally larger than their prey, they eat quickly. Many prey eat throughout their lives.


They live in or within the bodies of their hosts, they do not kill their guests immediately, only one host is needed during their lifetime, they are usually much smaller than their host but can reach the same size.


They are those insects that have a diet based on more than one type of food.

List of insects

The bee is essential for pollination.

Honey bee

honey bee o honey bees, also known as apis in Latin, although it is one of the most popular bees, it represents only a small percentage of the bee species. This species is the only surviving group of bees in the Apini subclass, which belongs to the genus Apis. They are known for producing and storing honey, or liquefied sugar, as well as for building impressive nests using wax secreted by the workers of a particular colony.

The bumblebee is a friendly insect that lives almost everywhere on the planet.


bumblebee (Bombus), is a large type of insects, hairy and close relatives of the well-known honey bee. Most species of bumblebees live in colonies, but their colonies are much smaller than those of honey bees or wasps, which can have up to several thousand individuals, the bumblebee colony will only consist of about 50 to 150 individuals. It has a loud hum that you can hear from a distance.


wasp (Hymenoptera) constitutes an enormous diversity of insects, with some 30.000 identified species. We are most familiar with those that are cloaked in bright warning colors, the ones that buzz angrily in groups and threaten us with painful stings, but most wasps are actually solitary, non-sting varieties. And they all do humans far more good by controlling pest insect populations than harm. Unlike of bees, the body of a wasp is smooth and has no hair.

The giant Asian hornet is a violent insect.

Giant asian hornet

Giant asian hornet (Vespa mandarinia) also known as Giant Sparrow BeeIs a insect aggressive predator that, despite its fierce nature, cannot cope with the accelerated loss of habitat, which is the greatest threat to the survival of this species in the wild.

Cockroach seen from above


The cockroach belongs to the order Blattodea. They are part of some of the 4.600 insects that are among the most primitive living winged insects, which today look similar to how they do in fossils more than 320 million years old.

Male specimen of the purple emperor butterfly

Purple emperor