A solitary species, the grey-bellied shrike-tyrant is commonly found perching conspicuously on the top of a rock or bush (2) (3). This species is a skilled hunter, taking insects on the wing or catching its prey whilst running along the ground. Other prey sources include small mammals, lizards, frogs and the eggs and nestlings of other bird species (2). In order to attract a mate, the male grey-bellied shrike-tyrant gives an aerial display, during which the two short, outer primary feathers produce a low-pitched, barely audible whirring sound. Although many aspects of the grey-bellied shrike-tyrant's reproduction are currently unknown, eggs have been found in January in Chile, while in Argentina, nests have been recorded in September and October, and eggs and fledglings reported in December (2). While the subspecies Agriornis micropterus andecola remains in the same location throughout the year, Agriornis micropterus micropterus leaves its breeding grounds in February, migrating northwards to southern Bolivia, Paraguay and northern Argentina where it overwinters (2).