Yellow-billed Cacique

The yellow-billed cacique (Amblycercus holosericeus) is a species of bird in the family Icteridae, the oropendolas, New World orioles, and New World blackbirds. It is found in Mexico, every Central American country, Bolivia, Colombia, Ecuador, Peru, and Venezuela. == Taxonomy and systematics == The yellow-billed cacique was formally described in 1830 with the binomial Sturnus holosericieus. In 1851 Jean Cabanis erected the genus Amblycercus with it as the type species. For part of the twentieth century it was assigned to genus Cacicus but by the end of the century had been firmly placed back in Amblycercus. It is basal to the oropendolas and caciques but is not closely related to any of them. The yellow-billed cacique is the only member of its genus and has these three subspecies: A. h. holosericeus (Deppe, 1830) A. h. flavirostris Chapman, 1915 A. h. australis Chapman, 1919 Some authors have suggested that A. h. australis might warrant full species status. The Clements taxonomy draws some distinction within the species, calling A. h. australis the "yellow-billed cacique (Chapman's)" and grouping the other two subspecies as the "yellow-billed cacique (Prevost's)". == Description == Yellow-billed cacique males are about 21.5 cm (8.5 in) and females about 20.5…