Largest organisms were related to the ostrich. They exceeded in height and . The last of the elephant birds became extinct about 300 years ago. Of almost exactly the same upper proportions as the largest elephant birds was "Dromornis stirtoni" of Australia, part of a 26,000-year-old group called mihirungs of the family Dromornithidae. The largest carnivorous bird was "Brontornis", an extinct flightless bird from South America which reached a weight of and a height of about . The tallest carnivorous bird was "Kelenken", which could reach 3 to 3.2 meters in height and 220 to 250 kilograms. The tallest bird ever was
White-whiskered puffbird White-whiskered puffbird The white-whiskered puffbird ("Malacoptila panamensis") is a resident breeding bird species from southeastern Mexico to central Ecuador. It is sometimes known as the white-whiskered softwing. This puffbird is found in forests, shady plantations, especially of Theobroma cacao, and old second growth in lowlands and foothills up to 1200m. It nests in a long, diameter burrow in, usually, gently sloping ground. The wider nesting chamber is lined with dried leaves. The female lays two, rarely three, glossy white eggs. Both sexes incubate the eggs and feed the young. The white-whiskered puffbird is a stout, large-headed, long bird which weighs