Geokichla

The Geokichla thrushes are medium-sized mostly insectivorous or omnivorous birds in the thrush family, Turdidae. They were traditionally listed in the Zoothera, but molecular phylogenetic studies published in 2008 led to their placement in a separate genus.

Taxonomy
The genus Geokichla was introduced in 1836 by the German naturalist Salomon Müller with Turdus citrinus Latham, 1790, the orange-headed thrush, as the type species. The genus name combines the Ancient Greek geō- meaning "ground-" with kikhlē meaning "thrush.

These species were formerly placed in the genus Zoothera. Molecular phylogenetic analysis by Gary Voelker and collaborators published in 2008 found that Zoothera was polyphyletic. To create monophyletic genera 21 species were moved from Zoothera to the resurrected genus Geokichla.

List of species
The genus contains the following 21 species:
 * Siberian thrush, Geokichla sibirica
 * Pied thrush, Geokichla wardii
 * Grey ground thrush, Geokichla princei
 * Black-eared ground thrush, Geokichla camaronensis
 * Spotted ground thrush, Geokichla guttata - formerly G. fischeri
 * Spot-winged thrush, Geokichla spiloptera
 * Crossley's ground thrush, Geokichla crossleyi
 * Abyssinian ground thrush, Geokichla piaggiae
 * Kivu ground thrush, Geokichla piaggiae tanganjicae
 * Oberländer's ground thrush, Geokichla oberlaenderi
 * Orange ground thrush, Geokichla gurneyi
 * Orange-headed thrush, Geokichla citrina
 * Buru thrush, Geokichla dumasi
 * Seram thrush, Geokichla joiceyi
 * Orange-sided thrush, Geokichla peronii
 * Slaty-backed thrush, Geokichla schistacea
 * Chestnut-capped thrush, Geokichla interpres
 * Enggano thrush, Geokichla leucolaema
 * Chestnut-backed thrush, Geokichla dohertyi
 * Ashy thrush, Geokichla cinerea
 * Red-backed thrush, Geokichla erythronota
 * Red-and-black thrush, Geokichla mendeni

A subfossil specimen of a ground thrush has been found on the island of Mauritius:
 * Mauritius ground thrush, Geokichla longitarsus