Poliocephalus rufopectus

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Svasso della Nuova Zelanda
Poliocephalus rufopectus
Stato di conservazione
Prossimo alla minaccia (nt)[1]
Classificazione scientifica
DominioEukaryota
RegnoAnimalia
SottoregnoEumetazoa
PhylumChordata
SubphylumVertebrata
SuperclasseTetrapoda
ClasseAves
SottoclasseNeornithes
SuperordineNeognathae
OrdinePodicipediformes
FamigliaPodicipedidae
GenerePoliocephalus
SpecieP. rufopectus
Nomenclatura binomiale
Poliocephalus rufopectus
(Jardine & Selby, 1827)

Lo svasso della Nuova Zelanda (Poliocephalus rufopectus (Jardine & Selby, 1827)) è un uccello della famiglia Podicipedidae.[2]

Descrizione

Questo podicipedide è lungo 28–30 cm, per un peso di 232–271 g.[3]

Biologia

Si nutre in prevalenza di piccoli invertebrati acquatici, come adulti e larve di insetti, crostacei d'acqua dolce (Parastacidae), molluschi e sanguisughe.[3]

Distribuzione e habitat

Questa specie è un endemismo della Nuova Zelanda.[1]

Un tempo diffusa in tutto l'arcipelago, il suo areale è attualmente ristretto all'Isola del Nord, con una distribuzione ampia ma frammentata. Vi sono recenti segnalazioni di una coppia nidificante nei pressi di Takaka, nell'Isola del Sud, evento che non si verificava dal 1941.[1]

Conservazione

La Lista rossa IUCN classifica Poliocephalus rufopectus come specie prossima alla minaccia di estinzione (Near Threatened).[1]

La specie è andata incontro ad estinzione locale sull'Isola del Sud e l'attuale popolazione è stimata in 1.900-2.000 esemplari.

Note

  1. ^ a b c d (EN) BirdLife International 2016, Poliocephalus rufopectus, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020. URL consultato il 29 aprile 2019.
  2. ^ (EN) F. Gill e D. Donsker (a cura di), Family Podicipedidae, in IOC World Bird Names (ver 14.2), International Ornithologists’ Union, 2024. URL consultato il 29 aprile 2019.
  3. ^ a b (EN) Llimona, F., del Hoyo, J., Jutglar, F., Kirwan, G.M. & Sharpe, C.J., New Zealand Grebe (Poliocephalus rufopectus), su Handbook of the Birds of the World Alive, 2019. URL consultato il 29 aprile 2019.

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