Elephant bird "A. maximus" and "D. stirtoni" were revised to 540 and 730 kg, respectively. Four species are usually accepted in the genus "Aepyornis" today, but the validity of some is disputed, with numerous authors treating them all in just one species, "A. maximus". Up to three species are generally included in "Mullerornis". Several ratites outside of Madagascar have been posited as "aepyornithid"-like and could potentially make this clade considerably more speciose. These include "Eremopezus" from the Eocene of North Africa, unnamed Canary Island remains and several Neogene taxa in Eurasia. "Aepyornis maximus" is commonly known as the 'elephant bird', a term
South Island reserves and parks There are several bird species which are endemic to the South Island. They include the kea, great spotted kiwi, Okarito brown kiwi, South Island kōkako, South Island pied oystercatcher, Malherbe's parakeet, king shag, takahe, black-fronted tern, South Island robin, rock wren, wrybill, and yellowhead. Many South Island bird species are now extinct, mainly due to hunting by humans and predation by cats and rats introduced by humans. Extinct species include the South Island goose, South Island giant moa, harpagornis and South Island piopio. The South Island has several tertiary level institutions: Healthcare in the South Island is