The next largest was Australian Dromornis stirtoni.

Dromornis stirtoni was the largest of the dromornithids, a group of huge flightless birds known only from Australia. The late Miocene Dromornis, from Alcoota Station in the Norther...

Birds (Aves)

Birds, also known as Aves, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweig...

Prosimians

Prosimians are the most primitive of the living primates, which also include the monkeys and apes. The name prosimian means pre-monkey. The living prosimians are placed in the suborder Prosimii, which includes four familie...

Primates (Primata)

Primates is the name of the order of mammals to which we happen to belong. The name means "first" or "most important" and was given to the order by Carl Linnaeus. While naming it that way may have been a matter of ...

The largest kangaroo ever was Procoptodon, which could grow to 3.0 m (10 ft) and weigh 230 kilograms (510 lb).
Procoptodon was a genus of giant short-faced kangaroo living in Australia during the Pleistocene epoch. P. goliah, the largest...

Sparassodonts

1. Borhyaena 2. Protodidelphis 3. Arctodictis 4. Prothylacinus 5. Dukecynus

Monotremes (Monotremata)

1. Tachyglossus 2. Megalibgwilia 3. Zaglossus

Armadillos,Glyptodonts and Sloths (Xenarthra)

The mammalian order Xenarthra includes the armadillos, sloths and anteaters, and the extinct glyptodonts; the mammalian order Pholidota comprises the pangolins or scaly anteaters. Although...

Astrapotherians (Astrapotheria)

Astrapotheria is an extinct order of South American and Antarctic hoofed mammals that existed from the Late Paleocene to the Middle Miocene, 59 to 12 million years ago.Astrapotheres were large and rhinoc...

Brontotheriidae

Brontotheriidae, also called Titanotheriidae, is a family of extinct mammals belonging to the order Perissodactyla,the order that includes horses, rhinoceroses, and tapirs.They lived around 56–34 million years ago,...

Notoungulates (Notoungulata)

Notoungulates –  literally “southern ungulates.” – may be the most emblematic of all extinct South American mammals. Notoungulates were the most abundant of the native South American ...

Bisons and other Bovines and Bovidaes

From left to right : Long-horned Bison(extinct), Pelorovis Antiquus(extinct), Ancient Bison(extinct), Steppe Bison(extinct), Aurochs(extinct), Holocene Bison(extinct), Cebu dwarf Buffalo(extinct), P...