International Ornithologists' Union in the context of "Perdicinae"

Pavonini is a tribe in the subfamily Phasianinae. Members of this family are primarily found in tropical Asia, along with one species in the Congo Rainforest in Africa. It contains two of the most charismatic members of the Phasianidae, the peafowl and the arguses. This grouping was supported by a 2021 phylogenetic analysis of Galliformes, and accepted by the International Ornithological Congress. The tribe name is accepted by the Howard and Moore Complete Checklist of the Birds of the World.

Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the International Ornithologists' Union (IOU) adopted a consensus taxonomy of seven genera. The great cormorant (Phalacrocorax carbo) and the common shag (Gulosus aristotelis) are the only two species of the family commonly encountered in Britain and Ireland, and the names "cormorant" and "shag" have been later assigned to different species in the family somewhat haphazardly.

Cormorants and shags are medium-to-large birds, with body weight in the range of 0.35–5 kilograms (0.77–11.02 lb) and wing span of 60–100 centimetres (24–39 in). The majority of species have dark feathers. The bill is long, thin and hooked. Their feet have webbing between all four toes. All species are fish-eaters, catching the prey by diving from the surface. They are excellent divers, and under water they propel themselves with their feet with help from their wings; some cormorant species have been found to dive as deep as 45 metres (150 ft). Cormorants and shags have relatively short wings due to their need for economical movement underwater, and consequently have among the highest flight costs of any flying bird.

The vampire ground finch (Geospiza septentrionalis) is a small bird native to the Galápagos Islands. Endemic to Wolf and Darwin Island, it was previously considered a very distinct subspecies of the sharp-beaked ground finch (Geospiza difficilis), but the International Ornithologists' Union has split the species based on strong genetic evidence that they are not closely related, and divergences in morphology and song.

Grouse /ɡraʊs/ are a group of birds from the order Galliformes, in the family Phasianidae. Grouse are presently assigned to the tribe Tetraonini (formerly the subfamily Tetraoninae and the family Tetraonidae), a classification supported by mitochondrial DNA sequence studies, and applied by the American Ornithologists' Union, ITIS, International Ornithological Congress, and others.

Grouse inhabit temperate and subarctic regions of the Northern Hemisphere, from pine forests to moorland and mountainside, from 83°N (rock ptarmigan in northern Greenland) to 28°N (Attwater's prairie chicken in Texas).

Rollulinae is a bird subfamily containing the jungle and wood partridges. They are sister to all other members of the family Phasianidae, having diverged during the late Eocene or early Oligocene, about 30-35 million years ago. Many taxonomists formerly placed this subfamily within the Perdicinae, but more recent studies have affirmed its existence, and it is accepted by taxonomic authorities such as the International Ornithological Congress.

Members of this family are mostly found in east and southeast Asia, but a single genus, which is sister to all other genera in the family, contains two species endemic to two mountain ranges in Tanzania.

The eastern barn owl (Tyto javanica) is usually considered a subspecies group and together with the American barn owl group, the western barn owl group, and sometimes the Andaman masked owl make up the genus Tyto. The cosmopolitan barn owl is recognized by most taxonomic authorities. A few (including the International Ornithologists' Union) separate them into distinct species, as is done here. The eastern barn owl is native to southeastern Asia, New Zealand, and Australasia.

The eastern barn owl is nocturnal over most of its range, but in some Pacific islands, it also hunts by day. They specialise in hunting animals on the ground, and nearly all of their food consists of small mammals which they locate by sound, their hearing being very acute. They mate for life unless one of the pair is killed, after which a new pair bond may be formed. Breeding takes place at varying times of year according to locality, with a clutch, averaging about four eggs, being laid in a nest in a tree hollow, old building or fissure in a cliff. The female does all the incubation, and she and the young chicks are reliant on the male for food. When large numbers of small prey are readily available, barn owl populations can expand rapidly.

The American barn owl (Tyto furcata) is usually considered a subspecies group and together with the western barn owl group, the eastern barn owl group, and sometimes the Andaman masked owl, make up the barn owl, cosmopolitan in range. The barn owl is recognized by most taxonomic authorities. A few (including the International Ornithologists' Union) separate them into distinct species, as is done here. The American barn owl is native to North and South America, and has been introduced to Hawaii.

The ashy-faced owl (T. glaucops) was for some time included in T. alba, and by some authors its populations from the Lesser Antilles still are. Based on DNA evidence, König, Weick & Becking (2009) recognised the American barn owl (T. furcata) and the Curaçao barn owl (T. bargei) as separate species, though the latter is now considered a subspecies of the American barn owl (T. furcata bargei; see #Subspecies, below).

Serinus is a genus of small birds in the finch family Fringillidae found in West Asia, Europe and Africa. The birds usually have some yellow in their plumage. The genus was introduced in 1816 by the German naturalist Carl Ludwig Koch. Its name is Neo-Latin for "canary-yellow".

Many species were at one time assigned to the genus but it became clear from phylogenetic studies of mitochondrial and nuclear DNA sequences that the genus was polyphyletic. This was confirmed by Dario Zuccon and coworkers in a comprehensive study of the finch family published in 2012. The authors suggested splitting the genus into two monophyletic groups, a proposal that was accepted by the International Ornithologists' Union. The genus Serinus was restricted to the European serin and seven other species while a larger clade from Africa and Arabia was assigned to the resurrected genus Crithagra.