Yellow-bellied chat-tyrant
The Yellow-bellied "pitajo" (Ochthoeca diadema) is a bird species in the Passeriformes order and Tyrannidae family. It measures 12.2 cm (4.7 inches) in length. It has a thick, short, thin beak. In general it is olive with a yellow ocher in front and a long yellow eyebrow. It has wings of dark color and a tail with two reddish bars. It is found mainly in Colombia, Ecuador, Peru and Venezuela. It feeds two in two apart and hunt near the ground in the foliage.
Taken from: Wikipedia.
Other references:, Venezuelan information system of Biological Diversity.