This is HUGE! Top 10 Largest Birds in the World

Blast from the Past
Argentavis magnificens, an extinct bird known only through fossils, is believed to have been the largest flying bird known to man. It had a wing span of up to 7 meters, almost twice that of the largest of extant birds, and weighed more than 50-60 kg, which would only be bettered by the ostrich out of all extant birds.
The last living relatives of the dinosaurs, more often than not, live up to the famed proportions of their almost-mythic ancestors. Who would think of a gigantic sauropod or a terrifying tyrannosaur when they see a sparrow? Who would be reminded of the triceratops by seeing a crow?

There are some birds, though, that, while not quite reaching the levels of dinosaurs, are giants in their own rights. Ostriches, for example, would comprehensively dwarf most humans. Moas and elephant birds, now extinct, would have dwarfed even ostriches!

Here’s a list of the 10 largest birds that can fly as well as those that can not fly.

The Winged Giants

This is a list of the top 10 heaviest birds alive today; weight is the criterion normally used to list the ‘largest’ birds. Most of these are too large to fly, and many even lack the skeletal structures (a keel on the breastbone) necessary for flight.
Ostrich
Ostrich

The ostrich, Struthio camelus, is the heaviest and tallest bird alive today.
► Average weight: 230 lb (104 kg)
► Maximum recorded weight: 346 lb (156.8 kg)
► Average height (length): 6.9 feet (2.1 m)
Southern Cassowary
Southern cassowary

The southern cassowary, Casuarius casuarius, is the largest bird in the continent of Australia.
► Average weight: 99 lb (45 kg)
► Maximum recorded weight: 190 lb (85 kg)
► Average height (length): 5.1 feet (1.55 m)
Northern Cassowary
Northern cassowary

The northern cassowary, Casuarius unappendiculatus, is the heaviest bird native to Asia.
► Average weight: 97 lb (44 kg)
► Maximum recorded weight: 170 lb (75 kg)
► Average height (length): 4.9 feet (1.49 m)
Emu
Emu

The emu: Dromaius novaehollandiae
► Average weight: 73 lb (33 kg)
► Maximum recorded weight: 150 lb (70 kg)
► Average height (length): 5.0 feet (1.5 m)
Emperor Penguin
Emperor penguin

The emperor penguin, Aptenodytes forsteri, is the largest species of penguins.
► Average weight: 69 lb (31.5 kg)
► Maximum recorded weight: 100 lb (46 kg)
► Average height (length): 3.7 feet (1.14 m)
Greater Rhea
Greater rhea

The greater rhea, Rhea americana, is the heaviest bird in the New World.
► Average weight: 51 lb (23 kg)
► Maximum recorded weight: 88 lb (40 kg)
► Average height (length): 4.4 feet (1.34 m)
Dwarf Cassowary
Dwarf cassowary

The dwarf cassowary: Casuarius bennetti
► Average weight: 43 lb (19.7 kg)
► Maximum recorded weight: 75 lb (34 kg)
► Average height (length): 3.4 feet (1.05 m)
Lesser Rhea
Lesser rhea

The lesser rhea: Rhea pennata
► Average weight: 43 lb (19.7 kg)
► Maximum recorded weight: 63 lb (28.6 kg)
► Average height (length): 3.2 feet (0.96 m)
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King Penguin
King penguin

The king penguin: Aptenodytes patagonicus
► Average weight: 30 lb (13.6 kg)
► Maximum recorded weight: 44 lb (20 kg)
► Average height (length): 3 feet (0.92 m)