The Giant water bug comes next on our list of one of the largest insects in the world. Known as toe-biters or alligator ticks, the giant water bug is a formidable predator in ponds and streams. 

These water bugs deliver a painful bite using their giant pincers and inject venomous saliva into their prey. They thrive near slow-moving water and feed on tadpoles and small fish. 

The largest species of the giant water bug can grow up to 4.5 inches. The biggest water bugs belong to the genus Lethocerus, with species Lethocerus grandis and Lethocerus maximus striving for the title of the biggest bug in the world.  

In South and Southeast Asia, people eat these giant bugs and consider them a wonderful delicacy.

Known for its massive horns, the Hercules beetle is one of the longest species of beetles on our planet1. You will only find these longhorns in male Hercules beetles, which they use to fight other males when looking for a mate. 

This horn also accounts for more than half of the male Hercules beetle, bringing them to a length of up to 7 inches. You can find Hercules beetles in Central and South America rainforests and the Caribbean islands.

In the remote regions of Papua New Guinea, you will find the butterfly species called Queen Alexandra’s Birdwing. This beautiful butterfly is also the largest in the world. It is so rare that a single specimen could cost thousands of dollars. 

Regarding their body and wingspan, the females have a slightly larger body and wingspan than the males. The female's body can measure up to 3 inches with a wingspan of over 10 inches.

Sadly, the Queen Alexandra’s Birdwing falls under an endangered species due to habitat destruction.

The Actaeon beetle is one of the biggest insects in the beetle world. It belongs to the family Scarabaeidae and is a rhinoceros beetle. This beetle is named after a famous Theban hunter in Greek mythology.

Its body measures about 50 to 120mm, and its dorsal surfaces are matte or shiny black. It has large tarsal claws and powerful legs. You will notice appendages resembling horns on the head of the male beetles. The females lay eggs, which take around nine months to develop. 

The Actaeon beetle is also one of the heaviest insects. In 2009, experts found the heaviest Actaeon, weighing 228 grams in the northern regions of South America, nearly the same as a female rat.

Elephant beetles do not have a trunk or look like elephants, but these beetles are one of the largest insects on the earth. While they do not have trunks, the male species have horns, which they use to show dominance, competing for food and mates. The males are also bigger than the females. But these beetles can grow up to 5.11 in.

They are black but have yellowish hair, making them yellowish-black. You can find these creatures in tropical environments in parts of Mexico and South and Central America. Elephant beetles are herbivores and feed on sap and tree bark.

The Chinese mantis is a praying mantis species native to China and other parts of Asia. It has a long, slender body appearing in brown and green colors. It is longer than most praying mantises and grows between 2.75 and 4 in long.

The Chinese mantis is a carnivore and can tackle and eat large insects, including grasshoppers, crickets, cockroaches, moths, and spiders.

Moose are the largest and heaviest extant species in the deer family. From the towering Alaskan moose of the North American wilderness to the more modestly-sized European moose, the eight moose sub-species illustrate these intriguing creatures' adaptability and ecological variety. They belong to the Cervidae family, including other members such as elk, caribou, and white-tailed deer. 

With adult males weighing between 900 and 1,400 pounds, moose tower above their deer relatives. On the other hand, female moose weigh an average of 800 to 1,300 pounds. These majestic animals can also stand up to 6.5 feet tall at the shoulder. 

Moose are not only known for their size but also their distinctive physical characteristics. They have elongated faces and an overhanging muzzle that extends beyond their upper lip. Furthermore, moose have relatively large and mobile ears that can rotate independently.

Adult male and female moose have a flap of skin, known as a bell or dewlap, hanging beneath their chin. The size of the bell increases with age and is more pronounced in dominant males. It serves as an additional visual display during the fall mating season and helps intimidate rival males.

The scientific name of the moose is Alces alces. However, other countries don't call them "moose." In British English, these majestic animals are more commonly called "elk." The largest moose population is in Canada, whose residents call them rubber-nosed swamp donkeys.

The term "elk" comes from the Old Norse word "elgr," which various European languages later adopted to refer to this animal. When European settlers arrived in North America, they met the indigenous Algonquin people who called the animal "moose" or "smoosh," which means twig-eater or stripper and eater of bark. 

This naming inconsistency has caused some confusion. In North American English, "elk" refers to a completely different species of deer, scientifically known as Cervus Canadensis. North American elk, also called wapiti, share a few similarities with moose, such as antlers and herbivorous diet. However, they are smaller in size and have a distinct appearance.

Male moose, called bulls, start to grow antlers during spring. These distinctive broad palmate antlers can span up to 6 feet in width and weigh as much as 40 pounds. Palmate antlers have a flat, palm-like structure with tines or points, which is uncommon for other deer family members with twig-like structured antlers.  

Interestingly, only bulls grow antlers, each with a unique pattern. All male moose grow and lose their antlers. Moose shed their antlers between mid-November and March.

Furthermore, the shed antlers play a crucial role in the ecosystem. Smaller mammals like squirrels, mice, and porcupines rely on fallen moose antlers to extract vital nutrients for bone strength, health, and reproduction. 

Birds, including woodpeckers and grouse, also benefit from consuming the antler fragments. Meanwhile, decomposition enriches the soil, fostering plant growth and supporting a more sustainable ecosystem.

Moose live in boreal forests, temperate broadleaf, and mixed forests across North America, Europe, and Asia. These regions have dense stands of coniferous trees and water bodies, like rivers and lakes. These habitats provide moose with abundant vegetation and diverse food sources.

In the Northeastern United States, you can spot them in the sprawling wilds of Alaska and Canada. Similarly, moose habitats stretch across the Atlantic, from Scandinavian countries to Russia, and even reach the remote areas of northeastern China.

One of the critical factors of moose habitat preference is their close association with water sources. These magnificent animals rely on the plants found in lakes, rivers, and swamps.