The paleognaths (Palaeognathae) are a clade of bird species of gondwanic distribution in Africa, South America, New Guinea, Australia and New Zealand....

infraclass of birds, called paleognaths or palaeognaths, within the class Aves of the clade Archosauria. It is one of the two extant infraclasses of birds...

the Struthioniformes, a group of paleognath birds which first appeared during the Early Eocene, and includes a variety of flightless forms which were present...

species by most authorities, while others are still reviewing the evidence. Struthionidae is a member of the Struthioniformes, a group of paleognath birds...

A list of prehistoric and extant species whose fossils have been found in the London Clay, which underlies large areas of southeast England. Plant fossils...

also the only nocturnal extant ratite. The understanding of relationships within the paleognath clade has been in flux. Previously, all the flightless members...

tinamou (Tinamus solitarius) is a species of paleognath ground bird. This species is native to Atlantic forest of eastern Brazil. All tinamou are from...

monotreme fossil from Patagonia, may represent an Australian immigrant. Paleognath birds (ratites and South American tinamous) may have made a similar migration...

belongs to the paleognath Lithornis vulturinus. White-faced heron (Egretta novaehollandiae), demonstrating the retracted neck that is typical of herons in...

What seems clear is that penguins belong to a clade of Neoaves (living birds except for paleognaths and fowl) that comprises what is sometimes called "higher...