Mammalia is a class which distinguishes a physiologically unique group of organisms from the rest in the entire animal kingdom. Humans belong to the same class and so do 5400 other species of organisms. From small cats, dogs and rodents to huge bears, tigers and whales, there exists a vast diversity with regard to the size and weight of the animal.

The largest mammal of the world is found both on the land as well as in the oceans. Here is a description of about 10 of the most magnificent organisms belonging to class Mammalia.

Blue Whale

Blue Whale

Scientifically termed as Balaenoptera musculus, this majestic organism is not only the largest mammal in the world, but also the biggest member of the entire animal kingdom. In fact, blue whale is the biggest animal ever in the history of the planet earth. At 190,000 kg, a blue whale weighs more than thirty to forty African elephants combined and more than over 2,000 human beings. On the other hand, with a maximum size reaching up to 30 meters, this ocean creature can be as large as an entire basket ball court. This massive organism is also the loudest among all animals, producing sounds up to 180 decibels in intensity. Moreover, despite its large size and heavy weight, it is one of the fastest swimming creatures with a maximum speed of 50 Km/hour.

African Bush Elephant

African Bush Elephant

Next to the blue whale is Africa's Bush Elephant which is the heaviest mammal on earth. Male elephants can have a length of 6 to 7.5 meters and a height of 3 meters. They can be as heavy as 13,000 pounds. On the other hand, the females are smaller with an average length lying between 5.4 and 6.9 meters and a height of 2.7 meters. Moreover, they only weigh around 6,600 pounds. Still, they are among the largest mammals on land. Interestingly, a baby elephant can be as heavy as 220 pounds. As the African Bush Elephant is the biggest of all land creatures, it does not face threat from any organism other than human beings as its predator.

Giraffe

Giraffe

These fascinating African creatures are the tallest of all animals on earth. Although, with an average weight of 3,500 pound, they are not as heavy as the blue whale or the African Bush Elephant, still their height puts them in the category of the biggest animals. A giraffe can be as tall as five to six meters. Its extremely long neck measures two meters in length which is almost half of the vertical height of a giraffe.

Killer Whale

Killer Whale

Another water creature, a killer whale is the biggest of all dolphins. It is also known as the blackfish due to its color. A fully grown killer whale can be between six to eight meters in length with six tons of weight. Contrary to its name, a killer whale is not dangerous for humans unless threatened by them. These carnivores feed on fish, squids and even larger animals including polar bears, penguins and other whales.

Southern Elephant Seal

Southern Elephant Seal

A southern elephant seal might not be the biggest mammal in the world, but it certainly is among the top ten. It wins the title of the biggest carnivore due to an average weight of 4,900 – 8,800 pounds of a male seal. Moreover, a male measures from 4.5 to 5.8 meters in length. Females, on the other hand, weigh around 2,000 pounds and measure around 2.6 to 3 meters in length. The largest southern elephant seal in South Georgia Possession Bay was recorded to have a length of 6.85 m along with a whooping 11,000 pounds of weight.

White Rhinoceros

White Rhinoceros

There are five species of rhinoceros with the White Rhino being the biggest of all in size and weight. At birth, a White Rhinoceros weighs around one hundred and forty pounds. As it grows, it gains up to 5,000 pounds and measures approximately thirteen feet between the nose and the tail. Just like most other organisms, White Rhinoceros also differs in size and weight according the gender, with the males being heavier and bigger. White Rhinoceros has been categorized as an odd-toed ungulate. The other members found in this category include zebras, horses, donkeys and tapirs. Among all these members, the White Rhinoceros is the biggest one.

Hippopotamus

Hippopotamus

Hippopotamuses are chubby and rather cute looking creatures. Their length varies from eleven to seventeen feet while their maximum weight can be up to 7,900 lb. A male hippopotamus keeps on growing throughout its life while the females attain their maximum length and weight at twenty-five years of age. Apart from being one of the biggest animals, a hippopotamus is also one of Africa's most violent and dangerous creatures. It is categorized as an even-toed ungulate. Other members of this group are camels, giraffe, deer, antelope and pronghorn. A hippopotamus, of course, is the biggest of all these organisms. It does not beat giraffe in height, but is heavier in weight.

Eastern Low Land Gorilla

Eastern Low Land Gorilla

The biggest of all primates, the Eastern Low Land Gorilla weighs around 500 pounds with six feet of height. Phil is one of the biggest Eastern Low Land Gorillas living in captivity in the St. Louis Zoo, USA. It measures 388 Kg in weight and 180 cm in height. Apart from being big, gorillas are also extremely intelligent primates. Scientists have succeeded at training the members of this species to learn sign language.

Polar Bear

Polar Bear

After the southern elephant seal, polar bears are the biggest carnivores. They are the largest among all carnivorous organisms living on land. These magnificent snow-white creatures weigh around 900 pounds in the case of males and 500 pounds if it is a female. The males can be 2.6 meters tall while a female polar bear attains the maximum height of 2 meters.

Tiger

Tiger

Another formidable carnivore, the tiger, is placed among the top ten. Known as Panthera tigris scientifically, it is the biggest of all cats. Different sub-species of tigers vary in size as well as morphology. The Siberian Tiger, known as Panthera tigris altaica, is the biggest among all subspecies. They can grow as tall as 3.7 meters with more than 423 kg of weight.

Latest Fish

Lionfish Facts

Lionfish Facts

Lionfish is a chordate which belongs to the family...read more

Cuttlefish Facts

Cuttlefish Facts

Cuttlefish is a mollusk which belongs to the class...read more

Octopus Facts

Octopus Facts

Do you know how, in the floor of an ocean, an octopus...read more

Sea Urchin Facts

Sea Urchin Facts

Sea urchins are tiny water creatures found in oceans...read more

Latest Birds

Victoria Crowned Pigeon
Information About Flamingos
Hoopoe Bird

Hoopoe Bird

Famous for its distinctive crown of...read more

Roseate Spoonbill Facts

Roseate Spoonbill

The beautiful Roseate Spoonbill...read more

How Do Animals Know When to Migrate?

How Do Animals Know When to Migrate?

You might have heard about migration in birds and studied...

Wireless Invisible Dog Fence: A New Way to Keeping Your Pup Safe
What To Look For In An Online Pet Store

What To Look For In An Online Pet Store

Whether you are looking for pet food, pet toys...

Pet Care Essentials Your Home Must - Have

Pet Care Essentials Your Home Must - Have

Whether you haven't had a pet for a while if you are...

Things You Must Be Aware Of Against Dog Attacks

Things You Must Be Aware Of Against Dog Attacks

Dogs are one of the most reliable and most adorable...

Largest Birds of Prey in the World by Size and Weight

Largest Birds of Prey in the World by Size and Weight

Also called raptors, the birds...

Common Pet Emergencies And What You Should Do?

Common Pet Emergencies And What You Should Do?

We all love pets. Whether...

List of Birds That Fly in V Formation

List of Birds That Fly in V Formation

Did you ever feast your eyes on the amazing phenomenon...

What is Honking? Why Do Peacocks Honk?

Why Do Peacocks Honk?

One of the most fascinating gifts of nature, peacocks...

Lionfish Facts

Lionfish Facts

Lionfish is a chordate which belongs to the family scorpaenidae and genus...

Types Of Goats

Types Of Goats

Goat is a mammal that belongs to the family Bovidae. Being a member of the sub-family...

Blue Chinned Sapphire Facts

Blue Chinned Sapphire

This is a kind of hummingbird. It is really small in size, only 8.9 cm as it can be seen...

Lizard Facts

Lizard Facts

Lizards are members of the reptilian class in the animal kingdom. They belong to...

Buffalo Facts, Types, Diet, Habitat And Pictures

Buffalo Facts, Types

Buffalo is a member of the animal kingdom and belongs to class mammalia. Most...

Baboons Facts, Breeds, Habitat, Diet And Pictures

Baboons Facts

Baboons are intelligent and opportunistic creatures which belong to the...

Egg Laying Mammals List and Facts with Pictures

Egg Laying Mammals

Mammals are always thought of giving birth to young ones but sometimes it can...

Dove Bird Facts, Habitat, Pictures and Diet

Dove Bird Facts

The birds that are considered as the symbol of love, peace and harmony are one...

Largest Birds of Prey in the World by Size and Weight

Largest Birds of Prey in the World by Size and Weight

Also called raptors, the birds...

List of Birds That Fly in V Formation

List of Birds That Fly in V Formation

Did you ever feast your eyes on the amazing phenomenon...

Birds of Prey List

Birds of Prey List

A bird of prey is also known as a raptor or a hunter. It belongs to the group of...

Millipedes Vs Centipedes

Millipedes Vs Centipedes

Centipedes and millipedes are both arthropods from the group...

Difference Between Warm Blooded and Cold Blooded Animals
Top 10 Extremely Dangerous Insects

Top 10 Extremely Dangerous Insects

The insects have been grouped in class 'insecta' of...

Sheep Vs Goat

Sheep Vs Goat

The goat and the sheep are related to each other through the same family. They...

Animals with Blue-colored Blood

Animals with Blue-colored Blood

Humans and other vertebrates have red-colored blood running...

Do Birds, Mammals And Reptiles Share A Common Ancestor?

Birds, Mammals And Reptiles

Before coming to the question of common ancestry of birds...