The yellow-billed cacique (Amblycercus holosericeus) is a species of cacique in the family Icteridae. It belongs to the monotypic genus Amblycercus. There is some question as to whether or not it is a true cacique. The plumage is entirely black. The legs and feet are dark gray. The eye is yellow or yellow-orange. The bill is yellow with a gray tinge. Measures 23 cm long. It is found in Belize, Bolivia, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Peru, and Venezuela. Three subspecies are known: Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, and heavily degraded former forest. The yellow-billed cacique feeds on insects and other invertebrates, as well as some fruit. It uses a pecking technique similar to that of a woodpecker to gain access to the interior of branches and bamboo. In some areas, this species is a bamboo specialist, while in other areas, it feeds from a variety of vegetation. In the spring, the yellow-billed cacique builds a sturdy cup-shaped nest, which is unusual for its family, who tend to build hanging woven nests.