The Black Hawk-Eagle is considered rare, and few studies have focused on this species. Many ecological characters have been inferred from comparisons with other sister species such as Ornate Hawk-Eagle (Spizaetus ornatus). Vocalizations have been recorded; nonetheless, little is known about their function and variation. Although frequently seen in soaring flight, little is known about the foraging behavior or other activities of Black Hawk-Eagles. Telemetry experiments could be a powerful tool for developing a better understanding of its behavior, and for gaining broader knowledge about its life history. With such information in hand, there also would be a better framework for direct conservation actions for the Black Hawk-Eagle.