Johann Georg Wagler writes descriptions of new bird species in Isis, oder Encyclopädische Zeitung published by Lorenz Oken Some are: the Russet-throated Puffbird, the Golden-fronted Woodpecker, the Pinnated Bittern, the Chestnut-coloured Woodpecker, the Brown Jay, the Intermediate Egret and the Ladder-backed Woodpecker
Johann Georg Wagler moves the Northern Bald Ibis to a new genus Geronticus (from the genus Upupa Carl Linnaeus, 1758)
Originally described by Scottish writer and naturalist Robert Kerr in 1793 as Psittacus hollandicus, the Cockatiel (or cockateel) was moved to its own genus, Nymphicus, by Wagler in 1832.
O. m. ruficeps (Wagler, 1830)
Rufous-headed Chachalaca
Although the genus was first described in 1832 by Johann Georg Wagler the four species in the genus were until recently retained in the larger genus Sterna, the genus that most terns are in (Bridge et al., 2005).
German naturalist Johann Georg Wagler, who first described the Pinnated Bittern in 1829, placed it in the genus Ardea at that time.
Its taxonomic affiliation is uncertain but at its first scientific discussion by Johann Georg Wagler in 1829 it was classified into the genus Gallicolumba (which includes Ground Doves and Bleeding-hearts); its closest relative is possibly the Santa Cruz Ground Dove.
Johann Georg Wagler's suggestion of the Ocydromus genus in 1830 to describe each Weka as a species was generally adopted.
It was formerly considered to be two species, with the southern and western nominate subspecies, R. t. tucanus, named the Red-billed Toucan, and the northern and eastern subspecies, R. t. cuvieri, Cuvier's Toucan (when considered a species; R. cuvieri, Wagler, 1827).
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