Pygmy goose
| Pygmy Geese | |
|---|---|
 | |
| Green Pygmy Goose | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Anseriformes |
| Family: | Anatidae |
| Subfamily: | Anatinae |
| Genus: | Nettapus Brandt, 1836 |
| Species | |
The pygmy geese are a group of very small "perching ducks" in the genus Nettapus which breed in the Old World tropics. They are the smallest of all wildfowl. As the "perching ducks" are a paraphyletic group,[1] they need to be placed elsewhere. The initially assumed relationship with the dabbling duck subfamily Anatinae[citation needed] has been questioned, and it appears they form a lineage in an ancient Gondwanan radiation of waterfowl, within which they are of unclear affinities.[2] An undescribed fossil species from the late Hemphillian (5.0–4.1 mya) of Jalisco, central Mexico, has also been identified from the distal end of a tarsometatarsus. It is only record of the genus in the New World.[3]
There are three extant species in the genus:
- Green Pygmy Goose Nettapus pulchellus of northern Australia and southern New Guinea.
- Cotton Pygmy Goose Nettapus coromandelianus of Southeast Asia.
- African Pygmy Goose Nettapus auritus of sub-Saharan Africa.
Their habitat is still freshwater lakes, where these neat ducks feed on seeds and other vegetation, especially water lilies.
Pygmy geese have short bills, rounded heads and short legs. They nest in tree holes.
References
- ↑ Livezey, Bradley C. (1986). "A phylogenetic analysis of recent anseriform genera using morphological characters" (Full text). Auk 103 (4): 737–754.
- ↑ Sraml, M.; Christidis, L.; Easteal, S.; Horn, P. & Collet, C. (1996). "Molecular Relationships Within Australasian Waterfowl (Anseriformes)". Australian Journal of Zoology 44 (1): 47–58. doi:10.1071/ZO9960047.
- ↑ Steadman, D.; Carranza-Castaneda, O. (2006). "Early Pliocene to early Pleistocene birds from central Mexico". Universidad Nacional Autónoma de México, Instituto de Geología and Centro de Geociencias, Publicacion Especial 4: 61–71. ISBN 970-32-3895-5.
Further reading
- Madge, Steve; Burn, Hilary (1987). Wildfowl : an identification guide to the ducks, geese and swans of the world. London: Christopher Helm. pp. 190–193. ISBN 0-7470-2201-1.
External links
Media related to Nettapus at Wikimedia Commons
Data related to Nettapus at Wikispecies