King penguins rank among the largest birds globally, second only to another species also featured on this list.
Weighing 64 lb, the lesser rhea inhabits South America's open scrub and grasslands in regions like Altiplano and Patagonia.
Despite their 'dwarf' label, these cassowaries from New Guinea, New Britain, and Yapen Island still make the top 10 largest bird list at 75 lb.
South America's largest native bird, the Greater Rhea stands up to 5.9 feet tall and weighs up to 88 lb.
Reaching up to 101 lb, emperor penguins are adept at surviving Antarctic cold, huddling together in temperatures as low as -40°C.
Endemic to Australia, emus are the second-tallest birds globally, standing up to 6 ft 3 in and weighing 150 lb.
Found in northern New Guinea, northern cassowaries are the middle-sized among their species, weighing 167 lb.