Gaviiformes is an order of aquatic birds containing the loons or divers and their closest extinct relatives. Modern gaviiformes are found in many parts of North America and northern Eurasia, though prehistoric species were more widespread.
Loons or divers are a group of aquatic birds found in much of North America and northern Eurasia. All living species of loons are members of the genus Gavia, family Gaviidae and order Gaviiformes.
Grebes are aquatic diving birds in the order Podicipediformes. Grebes are widely distributed freshwater birds, with some species also found in marine habitats during migration and winter. Most grebes fly, although some flightless species exist, most notably in stable lakes. The order contains a single family, the Podicipedidae, which includes 22 species in six extant genera.
The Gruiformes are an order containing a considerable number of living and extinct bird families, with a widespread geographical diversity. Gruiform means "crane-like".
Hesperornis is a genus of cormorant-like Ornithuran that spanned throughout the Campanian age, and possibly even up to the early Maastrichtian age, of the Late Cretaceous period. One of the lesser-known discoveries of the paleontologist O. C. Marsh in the late 19th century Bone Wars, it was an early find in the history of avian paleontology. Locations for Hesperornis fossils include the Late Cretaceous marine limestones from Kansas and the marine shales from Canada. Nine species are recognised, eight of which have been recovered from rocks in North America and one from Russia.
Aiolornis incredibilis is an extinct species of teratorn bird from the western United States. Only fragmentary remains have been found, which are dated between the Early Pliocene (Zanclean) and Late Pleistocene. First described as Teratornis incredibilis by Howard in 1952 based on a cuneiform bone, the species has been moved to the new genus Aiolornis by Campbell, Scott and Springer in 1999. The generic name is derived from the ancient Greek words aiolus and ornis. Aiolus refers to the Greek god of the wind, and ornis means "bird". The specific name incredibilis means 'incredible'. A. incredibilis is lesser-known than its close relative, Teratornis merriami, even though A. incredibilis was significantly larger. It presumably became extinct at the same time as the other megafauna in North America.
Podiceps is a genus of birds in the grebe family. The genus name comes from Latin podicis, "rear-end" and ped, "foot", and is a reference to the placement of a grebe's legs towards the rear of its body.
The St. Croix macaw or Puerto Rican macaw is an extinct species of macaw whose remains have been found on the Caribbean islands of St. Croix and Puerto Rico. It was described in 1937 based on a tibiotarsus leg bone unearthed from a kitchen midden at a pre-Columbian site on St. Croix. A second specimen consisting of various bones from a similar site on Puerto Rico was described in 2008, while a coracoid from Montserrat may belong to this or another extinct species of macaw. The St. Croix macaw is one of 13 extinct macaw species that have been proposed to have lived on the Caribbean islands. Macaws were frequently transported long distances by humans in prehistoric and historical times, so it is impossible to know whether species known only from bones or accounts were native or imported.
The Mauritius sheldgoose, also known as the Mauritius shelduck, is an extinct species of sheldgoose that was endemic to the island of Mauritius. While geese were mentioned by visitors to Mauritius in the 17th century, few details were provided by these accounts. In 1893, a carpometacarpus wing-bone and a pelvis from the Mare aux Songes swamp were used to name a new species of comb duck, Sarcidiornis mauritianus. These bones were connected to the contemporary accounts of geese and later determined to belong to a species related to the Egyptian goose and placed in the sheldgoose genus Alopochen. The Mauritius and Réunion sheldgoose may have descended from Egyptian geese that colonised the Mascarene Islands.
Anatalavis is genus of prehistoric birds related to ducks and geese, perhaps to the magpie-goose in particular. Alternatively, it might have been a more basal lineage of Anserimorphae distinct from the living waterfowl, similar or even related to the roughly contemporary Conflicto antarcticus from the Danian of Antarctica.
Palaeochenoides is a genus of the prehistoric pseudotooth birds of somewhat doubtful validity. These were probably rather close relatives of either pelicans and storks, or of waterfowl, and are here placed in the order Odontopterygiformes to account for this uncertainty.
Eonessa is an enigmatic genus of bird possibly belonging to bird order Gruiformes and which consists of the single species Eonessa anaticula.
The genus Colymboides contains three species of early loon dating from the late Oligocene or early Miocene. They are considered to be the earliest known unambiguous gaviiform fossils. The genus is widely known from early Priabonian – about 37 million years ago in the Late Eocene – to Early Miocene limnic and marine rocks of western Eurasia north of the Alpide belt, between the Atlantic and the former Turgai Sea. It is usually placed in the Gaviidae already, but usually in a subfamily Colymboidinae, with the modern-type loons making up the Gaviinae. But the Colymboides material is generally quite distinct from modern loons, and may actually belong in a now-extinct family of primitive gaviiforms. The best studied species, Colymboides minutus, was described by Robert Storer as being much smaller than modern loons and not as well adapted to diving.
The Puerto Rican crow is an extinct crow species in the family Corvidae that was endemic to Puerto Rico and the United States Virgin Islands. Little is known about its habitat, but it possibly died out after the colonization of humans on these islands.
Eleutherornis cotei is an extinct flightless predatory cariamiform bird which lived during the Middle Eocene of France and Switzerland. Since the early 20th century, researchers have initially described the fossils of Eleutherornis as separate taxa, some remains as a species of Gastornis and others as an ancient ratite related to modern ostriches. However, subsequent analyses have questioned the original interpretations, and a thorough reexamination in 2013 indicated that all of these described remains represent the same species.
Phoenicopterus copei is an extinct species of flamingo that inhabited North America during the Late Pleistocene. Its fossils have been discovered in Oregon, California, Mexico and Florida. Many of these localities preserve the remains of juvenile individuals, indicating that this species nested at the lakes found there. In some areas like California and Florida it coexisted with smaller flamingo species. P. copei was a large species of Phoenicopterus, described as being greater in size than modern American flamingos.
Palaeoscinis is an extinct genus of songbird described in 1957 from the middle Miocene of the Monterey Formation in Santa Barbara, California. It is assigned to the extinct monotypic family Palaeoscinidae, and contains the type and only species P. turdirostris.
Miodytes is a fossil genus of grebe known from a nearly complete specimen from Valjevo Basin, western Serbia known from an almost complete right wing skeleton. It contains a single species, M. serbicus.
Podiceps oligoceanus is an extinct species of grebe possibly from the Neogene period which the specimen has been found in the United States.
