Poliocephalus | |
---|---|
Hoary-headed grebe, Poliocephalus poliocephalus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Podicipediformes |
Family: | Podicipedidae |
Genus: | Poliocephalus Selby, 1840 |
Type species | |
Podiceps nestor [1] Gould, 1836 | |
Species | |
Poliocephalus is a small genus of birds in the grebe family. Its two members are found in Australia and New Zealand.
There are two species in the genus:
Common name | Scientific name and subspecies | Range | Size and ecology | IUCN status and estimated population |
---|---|---|---|---|
Hoary-headed grebe | Poliocephalus poliocephalus (Jardine & Selby, 1827) | Australia and Tasmania | Size: Habitat: Diet: | LC |
New Zealand grebe | Poliocephalus rufopectus (Gray, 1843) | New Zealand. | Size: Habitat: Diet: | LC |
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Genus is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.
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In biology, taxonomic rank is the relative level of a group of organisms in an ancestral or hereditary hierarchy. A common system of biological classification (taxonomy) consists of species, genus, family, order, class, phylum, kingdom, and domain. While older approaches to taxonomic classification were phenomenological, forming groups on the basis of similarities in appearance, organic structure and behavior, methods based on genetic analysis have opened the road to cladistics, a method of classification of animals and plants according to the proportion of measurable or like characteristics that they have in common. It is assumed that the higher the proportion of characteristics that two organisms share, the more recently they both came from a common ancestor.
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