With little fieldwork being undertaken within the chestnut-bellied flower-piercer’s range, not much is known about the biology and ecology of this rarely seen bird, although it is presumed to be similar to the glossy flower-piercer (Diglossa lafresnayii), (which some have believed it to be a subspecies of) (4). Thus, it is likely to occur singly, or in pairs (2), and hop furtively through dense vegetation. Sometimes it may sing from the tops of shrubs, or be seen actively catching flies (4). As well as insects such as flies, the chestnut-bellied flower-piercer feeds on nectar, puncturing or tearing apart the base of a flower to gain access to this rich food source. However, by obtaining the nectar in this manner, the chestnut-bellied flower-piercer plays no part in the pollination of the plant (5).