Despite sharing the common name ‘teal’, the Blue-winged Teal (BWTE, Spatula discors) is not in the same genus (Anas) as the Green-winged Teal (GWTE) from my earlier review, although it was for a period. The genus Spatula, originally described in 1822 and eventually placed in synonymy with Anas, was resurrected in 2009 after a molecular phylogeny looking at two mitochondrial genes (cytochrome b and the NADH dehydrogenase subunit 2) determined Anas to be non-monophyletic.