Bata mkia-ngumu

Bata mkia-ngumu

Uainishaji wa kisayansi

Himaya:	Animalia (Wanyama)
Faila:	Chordata (Wanyama wenye ugwe wa neva mgongoni)
Nusufaila:	Vertebrata (Wanyama wenye uti wa mgongo)
Ngeli:	Aves (Ndege)
Oda:	Anseriformes (Ndege kama mabata)
Familia:	Anatidae (Ndege walio na mnasaba na mabata)
Nusufamilia:	Oxyurinae Swainson, 1831

Ngazi za chini

Jenasi 4, spishi 10:

Biziura Stephens, 1824
- B. lobata (Shaw, 1796)
Heteronetta Salvadori, 1865
- H. atricapilla Merrem, 1841
Nomonyx Ridgway, 1880
- N. dominicus Linnaeus, 1766
Oxyura Bonaparte, 1828
- O. australis Gould, 1836
- O. ferruginea (Eyton, 1838)
- O. jamaicensis (Gmelin, 1789)
- O. leucocephala (Scopoli, 1838)
- O. maccoa (Eyton, 1838)
- †O. vantetsi Worthy, 2005
- O. vittata (Philippi, 1860)

Mabata mkia-ngumu ni ndege wa maji wa nusufamilia Oxyurinae katika familia Anatidae. Manyoya ya mkia wao ni makavu na yametandawaa mara nyingi. Rangi ya dume ni kahawia au kahawiachekundu na domo lake lililovimba msingini ni buluu; jike ni mweusi au kijivu wenye domo la rangi ile ile. Spishi hizi huzamia kabisa ili kutafuta chakula. Hula mimea na invertebrata ya maji. Miguu yao iko nyuma sana, kama ile ya mabata wazamaji, ili kujisogeza mbele vizuri ndani ya maji. Kwa sababu hiyo hawawezi kutembea vizuri. Hujenga tago lao ndani ya uoto mzito wa maji. Jike huyataga mayai 3-8, lakini pengine hadi mayai 12 yanapatikana kwa sababu jike mwingine ameongezea mayai yake.

Spishi za Afrika

Oxyura jamaicensis, Bata Uso-mweupe (Ruddy Duck) imewasilishwa
Oxyura leucocephala, Bata Kichwa-cheupe (White-headed Duck)
Oxyura maccoa, Bata Makoa (Maccoa Duck)

Spishi za mabara mengine

Biziura lobata (Musk Duck)
Heteronetta atricapilla (Black-headed Duck)
Nomonyx dominicus (Masked Duck)
Oxyura australis (Blue-billed Duck)
Oxyura ferruginea (Andean Duck)
Oxyura vantetsi (New Zealand Stiff-tailed Duck imekwisha sasa (miaka 1500)
Oxyura vittata (Argentine Blue-bill)