| The population of birds |
|---|
 |
This is a list of Podicipediformes species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology.
This list is not comprehensive, as not all Podicipediformes have had their numbers quantified.
| Common name | Binomial name | Population | Status | Trend | Notes | Image |
|---|---|---|---|---|---|---|
| Junin grebe | Podiceps taczanowskii | 217- 304 [1] | CR [1] |  [1] | Endemic to Lake Junín, Peru. [1] |  |
| Hooded grebe | Podiceps gallardoi | 1000 – 1200 [2] | CR [2] | [2] | Estimated at 3000 – 5000 in 1997. [2] | |
| New Zealand grebe | Poliocephalus rufopectus | 1900 – 2000 [3] | VU [3] | [3] |  | |
| Madagascar grebe | Tachybaptus pelzelnii | 5000 [4] | VU [4] | [4] | Minimum estimate. [4] |  |
| Clark's grebe | Aechmophorus clarkii | 11 000 – 21 000 [5] | LC [5] | [5] |  | |
| Western grebe | Aechmophorus occidentalis | 130 000 [6] | LC [6] | [6] |  | |
| Horned grebe | Podiceps auritus | 140 000 – 1 100 000 [7] | LC [7] | [7] |  | |
| Red-necked grebe | Podiceps grisegena | 190 000 – 290 000 [8] | LC [8] | [8] |  | |
| Little grebe | Tachybaptus ruficollis | 610 000 – 3 500 000 [9] | LC [9] | [9] |  | |
| Great crested grebe | Podiceps cristatus | 920 000 – 1 400 000 [10] | LC [10] | Unknown [10] |  | |
| Black-necked grebe | Podiceps nigricollis | 3 900 000 – 4 200 000 [11] | LC [11] | Unknown [11] |  | |
The great crested grebe is a member of the grebe family of water birds noted for its elaborate mating display.
The horned grebe or Slavonian grebe is a relatively small waterbird in the family Podicipedidae. There are two known subspecies: P. a. auritus, which breeds in the Palearctic, and P. a. cornutus, which breeds in North America. The Eurasian subspecies is distributed over most of northern Europe and the Palearctic, breeding from Greenland to western China. The North American subspecies spans most of Canada and some of the United States. The species got its name from large patches of yellowish feathers located behind the eyes, called "horns", that the birds can raise and lower at will.
A booby is a seabird in the genus Sula, part of the family Sulidae. Boobies are closely related to the gannets (Morus), which were formerly included in Sula.
This article is a list of biological species, subspecies, and evolutionary significant units that are known to have become extinct during the Holocene, the current geologic epoch, ordered by their known or approximate date of disappearance from oldest to most recent.
Butastur is a genus of birds of prey in the family Accipitridae.
Nisaetus is a genus of subfamily Aquilinae found mainly in tropical Asia. They were earlier placed within the genus Spizaetus but molecular studies show that the Old World representatives were closer to the genus Ictinaetus than to the New World Spizaetus. They are slender-bodied, medium-sized hawk-eagles with rounded wings, long feathered legs, barred wings, crests and usually adapted to forest habitats.
