Twenty species of Rallidae
have become extinct since 1600, and 33 of the remaining 133 extant species (24%) are currently globally threatened (Taylor 1996).
According to the International Union for Conservation of Nature, 21% of the world's 156 Rallidae
species are extinct, and approximately one-third of the remaining species are classified as either "Near Threatened" or at a higher risk of extinction (International Union for Conservation of Nature, http://www.
It is represented essentially by the Anatidae, the Rallidae
, the Podicipedidae, the Phalacrocoracidae, the Ardeidae, the Threskiornithidae, the Coconiidae, the Accipteridae, the Pandionidae, the Recurvirostridae, the Charadriidae, the Alcedinidae, the Laridae, the Sterninae and the Scolopacidae [41, 44].
Species covered: ratites such as ostriches and emus; the rallidae
family, which includes woodhens and rails; gliders; penguins; grebes and cormorants; waterfowl; and extinct species.
Such movements are common in the Rallidae
(Ripley 1977, Sick 1997, Taylor 1998), and Redies (2010) implied that this could be the case of A.
Philopteridae (Mallophaga Ischnocera) nuevos o poco conocidos parasitos de Rallidae
Livezey (2003), in an exhaustive quantitative analysis of the morphological manifestations of flightlessness in the Rallidae
, concluded that Gallirallus wakensis was small relative to its congeners (Livezey 2003), a fact that had been readily observable since the species' discovery.
strigulosus (a) Ardeidae (1) Butorides striata Accipitridae (2) Elanoides forficatus Harpagus bidentatus Psophiidae (1) Psophia leucoptera Rallidae
(1) Aramides cajanea Eurypygidae (1) Eurypyga helias Columbidae (5) Columbina talpacoti Patagioenas plumbea Leptotila verreauxi L.