Top 10 Largest Birds in The World (Living)

Wondering which is the Largest bird in the world or which is the heaviest bird in the world still living? Then you are at the right place. This article will provide you a list of  Top 10 Largest and heaviest birds in the world.

Birds are very adorable, and it comes in various shape and sizes. It can be as little as 5 cm (bee hummingbird), and as large as 2.1 meters (Ostrich). Flying provides birds ability to migrate to all around the world (Though currently some birds cannot fly). And starting from the North Pole to south pole it can be found anywhere.

Top 10 Largest Birds in The World (Living)

In the long evaluation process, nature gifted us several small and large gorgeous birds as well as monster looking birds. Know about  Top 10 Smallest Birds in the world

So let’s have a look at the list of top 10 largest living birds in the world.

10. King penguin

10th largest bird in the world - King penguin
King penguin – 10th largest bird in the world

Average mass : 13.6 kg, Maximum mass : 20 kg, Average total length : 92 cm

King penguin secures the 10th spot in the list of Top 10 Largest living birds in the world. As the name suggests,it’s the king of all penguins and largest among them. King penguin weighs about 14 kilograms and can grow up to 1 meter tall. King penguin eats krill, small fish, squid and other small sea animals. The hard climate and temperature of the extreme south forced king penguin to become social. They are heavily social and helps each other to acquire heat during an ice storm. King penguin can regularly dive in the sea to a depth of 100 meters, and highest recorded king penguin dive was 300 meters. King penguin mainly lives in Antarctic and some sub-antarctic island.

9. Great bustard

Great bustard
Great bustard

Average mass : 14 to 19 kg, Maximum mass : 21 kg, Average total length : 90 cm to 110 cm

Great bustard is the heaviest flying bird in the world. One specimen of male bustard weighted 21 kg. An average male bustard is about a meter tall and has a wingspan of 2.4 meters. Female bustard is smaller in dimension than the male counterpart. Bustards are omnivorous and take different food at the different season which helps them to live up to 10 years in the wild. In a controlled environment, great bustard is known to live up to 15 years. upper portion and tail of this bird are covered by brown & black wing, whereas lower portion and head is covered by a whitish feather. Great bustard is the 9th largest bird in the world and heaviest flying bird.

8. Lesser rhea

Lesser rhea

Average mass : 19.6 kg, Maximum mass : 28.6 kg, Average total length : 100 cm

Lesser rhea, also known as Darwin’s rhea is a flightless bird mainly found in southern part of South America (Chile, Bolivia, Argentina, Perú). Lesser rhea can be up to 1 meter high and 28 kg in weight. Lesser rhea has a small head and a relatively big body and neck. Despite its inability to fly, it can run at a speed of 60km/hr, providing it an edge over predators. Sharp claws in its two powerful legs help it to fight predator, protect the egg and dig for food. Lesser rhea survives on fruit and grasses. During mating time, male lesser rhea becomes very aggressive to protect its territory. Darwin’s rhea ranks 8th in top 10 largest birds in the world list.

7. Dwarf cassowary

Dwarf cassowary
Dwarf cassowary

Average mass : 19.7 kg, Maximum mass : 34 kg, Average total length :105 cm

It is the smallest of all cassowary species, primarily found in mountain forests of  New Guinea, New Britain, and Yapen Island. Dwarf cassowary is a solitary bird and pairs with a male in the breeding season. They mainly feed on  insects, small animals, and fallen fruits. They are flightless but with their strong legs they run up to a speed of 48 km/h.

6. Greater rhea

Greater rhea
Greater rhea

Average mass : 23 kg, Maximum mass : 40 kg, Average total length : 134 cm

Greater rhea is another South American flightless bird. Greater Rhea is larger and heavier than it’s counterpart lesser rhea. Greater rhea is more spread out than Darwin’s rhea and can be found in Brazil, Uruguay, Paraguay, Argentina, and Bolivia. A greater rhea can be up to 1.3 meters tall and as heavy as 40 kg. Average greater rhea lives about 10 years in the wild. Body and construction of Greater rhea are similar to lesser rhea, the only thing which differs is size and body mass. Greater Rhea is the largest bird in South America and 6th Largest bird in the world.

5. Emperor Penguin

Emperor Penguin
Emperor Penguin

Average mass : 31.5 kg, Maximum mass : 46 kg, Average total length : 114 cm

Emperor penguin which rules all other species with its weight and length. Emperor penguin weights about 31 kg, more than half of which is fat. Body fat behind the skin helps them to survive in the extreme winter of Antarctica (up to -65 degree C). An emperor penguin can grow up to 1.1 meters. Back portion and head of Emperor penguin are covered with the black waterproof feather which helps them to capture as much heat as possible from sunlight. Front portion of its body is covered by white waterproof feather. Neck portion of both male and female emperor has a whitish bright yellow feather.

Emperor Penguin lives around 20 years in the wild, but in an ideal condition they can live up to 50 years. Emperor penguin only lives in Antarctica and it’s surrounding ocean. Body weight and length puts Emperor in the Top 5 among top ten largest birds in the world.

4. Emu


Average mass : 33 kg, Maximum mass : 70 kg, Average total length : 153 cm

Emu, close relative to cassowaries species, is a flightless bird native to Australia. This is the national bird of Australia. Emus can reach up to a height of 2 m, which makes them second tallest amongst the birds. Emus have three sub-species, amongst them, two sub-species (novaehollandiae and woodwardi ) are widely found in several places in Australia throughout the country. Their main diet consists of fruit, seed, insects, some dead creatures like rodent, bird, insects etc.

3. Northern cassowary

Northern cassowary
Northern cassowary

Average mass : 44 kg, Maximum mass : 75 kg, Average total length : 149 cm

Also known as single-wattled cassowary, is a flightless bird  with black plumage. A female is slightly larger than the male, weighing an average of 44 kg, making it the third heaviest bird in the world. It is found in the islands of  Yapen, Batanta, and Salawati. Fruits and small animals consist of in their primary diet.

2. Southern cassowary

Southern cassowary - 2nd among largest birds in the world
Southern cassowary – 2nd among largest birds in the world

Average mass : 45 kg, Maximum mass : 85 kg, Average total length : 155 cm

Southern cassowary, also known as double-wattled cassowary, is the second largest bird in the world. They are unable to fly like Ostrich. It is primarily found in the tropical rainforests of Indonesia, New Guinea, and islands of northern Australia. It feeds on the fruits, insects, and vertebrates. The males incubate the eggs and rare the chicks alone.

1. Ostrich

Ostrich - Largest bird in the world
Ostrich – Largest bird in the world

Average mass : 104 kg, Maximum mass : 156.8 kg, Average total length : 210 cm

Ostrich is the largest living bird on Earth. Ostrich can not run with their heavy wings but they can run at high-speed with their strong long legs. Ostriches lay the biggest/heaviest eggs weighing about 1.4 kg. Historically Ostrich is an African bird but due to farming, they are also found in Australia and America. They consume mainly fruit, grass, flowers and even reptiles like snakes, lizards when occasionally available. Male ostriches are good fathers as they help to build nests, incubating the eggs and look after the chicks.

Enjoyed reading Top 10 Largest Birds in The World ? Share it with your friends and family to let them know. Want to know more, read Top 10 Smallest Birds in the world. Do let us know in the comment section if you have any suggestion to improve the list.

Sadekur Rahaman

Engineer, blogger, Gadget Geek, founder of several useful websites including All Top Tens who loves to read and write.

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