Sibley-Ahlquist taxonomy

The Sibley-Ahlquist taxonomy is a radical new approach to taxonomy based on DNA studies which gives an arrangement differing greatly from the more traditional approach used in list of birds. The major changes at order level are as follows;

Enlarged Struthioniformes replaces the ratite orders Rheiformes rheass, Casuariiformes cassowaries, and Apterygiformes kiwis and Struthioniformes ostriches
Tinamiformes tinamous unchanged
New greatly enlarged Ciconiiformes includes the previous Sphenisciformes penguins, Gaviiformes diverss, Podicipediformes grebes, Procellariiformes tubenoses, Pelecaniformes pelicans and allies, Ciconiiformes storks and allies, Falconiformes birds of prey, Charadriiformes waders gulls terns and auks.
Anseriformes ducks and allies unchanged
New Craciformes chachalacas etc. Previously Galliformes
New Ralliformes railss and crakes
New Gruiformes Craness
New Turniciformes button-quails etc. Previously Gruiformes
Columbiformes doves unchanged
Psittaciformes cockatoos and parrots unchanged
New Musophagiformes turacos. Previously Cuculiformes.
New Cuculiformes rest of cuckoos
New Strigiformes owls enlarged to include Caprimulgiformes nightjars
New Apodiformes swifts
New Trochiliformes hummingbirds. Previously Apodiformes.
Coliiformes mousebirds unchanged
Trogoniformes trogons unchanged
New Coraciiformes rollers
New Upupiformes Hoopoe, previously Coraciiformes
New Bucerotiformes hornbills, previously Coraciiformes
New Galbuliformes jacamars, previously Piciformes
Piciformes woodpeckers
Passeriformes perching birds unchanged.

This revolutionary reordering has been widely accepted by North American ornithologists, including the American Ornithologists' Union, but in other parts of the world its effect has been more evolutionary: it has been a respected major influence on existing classification schemes, as opposed to a complete replacement for them.

A more recent paper looked at the ancestry of bird groups. The traditional view of avian evolution places ratites and tinamous at the base of the tree of modern birds (Neornithes), followed by old marine groups such as the penguins, grebes and divers (loons).

The new research suggested that the ducks and gallinaceous birds are each other?s closest relatives and together form the basal lineage of neognathous birds. The ratites and tinamous will now be followed by the ducks and their allies, and then the pheasants and their allies]].

This latter research has been accepted by the British Ornithologists' Union, and the British list will now start with Anseriformes and Galliformes

See also:

Charles Sibley
The Sibley-Monroe checklist, multiple parts:
- part 1 - (ostrich to quail)
- part 2 - (screamer to woodpecker)
- part 3 - (barbet to tody)
- part 4 - (kingfisher to parrot)
- part 5 - (swift to turaco)
- part 6 - (owl to pigeon)
- part 7 - (sunbittern to jacana)
- part 8 - (sheathbill to falcon)
- part 9 - (grebe to storm-petrel)
- part 10 -
- part 11 -
- part 12 -
- part 13 -
- part 14 -
- part 15 -
- part 16 -
- part 17 -
- part 18 -

References

Sibley, C. G., and J. Ahlquist. 1990. Phylogeny and classification of birds. Yale University Press, New Haven, Conn.

The Early History of Modern Birds Inferred from DNA Sequences of Nuclear and Mitochondrial Ribosomal Genes Marcel van Tuinen, Charles G. Sibley, and S. Blair Hedges Department of Biology, Institute of Molecular Evolutionary Genetics, and Astrobiology Research Center, Pennsylvania State University