Largest & Heaviest Flying Birds on Earth

1. Common Ostrich

ostrich
Average mass: 104 kg (230 lbs), Maximum mass: 156.8 kg (346), Average total length: 210 cm (6.9 ft.) or more
 

2. Southern Cassowary

horned-bird
Average mass: 45 kg (97 lbs), Maximum mass: 85 kg (190 lbs), Average total length: 155 cm (5.1 ft.) or more
 

3. Emu

Emu
Average mass: 33 kg (73 lbs), Maximum mass: 70 kg (150 lbs), Average total length: 153 cm (5 ft.) or more
 

4. Emperor Penguin

emperor-penguins
Average mass: 31.5 kg (69 lbs), Maximum mass: 46 kg (100 lbs), Average total length: 114 cm (3.7 ft.) or more
 

5. Greater Rhea

rhea
Average mass: 23 kg (51 lbs), Maximum mass: 40 kg (88 lbs), Average total length: 134 cm (4.4 ft.) or more
 

6. Kori Bustard

kori-bustard
Size. The male kori bustard is 120 to 150 cm (3 ft 11 in to 4 ft 11 in), stands 71–120 cm (2 ft 4 in–3 ft 11 in) tall and may have a wingspan about 230 to 275 cm (7 ft 7 in to 9 ft 0 in). Male birds may typically weigh between 7 and 18 kg (15 and 40 lb) or more
 

7. Andean Condor

Andean Condor
Average mass: 7.7 – 15 kg, wingspan: 274 to 310 cm (8.99 to 10.17 ft) or more
 

8. King penguin

king-penguin
Average mass: 13.6 kg (30 lbs), Maximum mass: 20 kg (44 lbs), Average total length: 92 cm (3 ft.) or more
 

9. Great Bustard

bustard
Average mass: 14 to 19 kg (33-43 lbs), Maximum mass: 21 kg (46 lbs), Average total length: 92 cm to 115 cm (3-3.8 ft.) or more
 

10. Lesser Rhea

rhea-bird
Average mass: 19.6 kg (43 lbs), Maximum mass: 28.6 kg (63 lbs), Average total length: 96 cm (3.2 ft.) or more