Subspecies
Hieraaetus morphnoides (Sibley and Monroe 1990, 1993) has been split into Little Eagle (Hieraaetus morphnoides) and Pygmy Eagle (Hieraaetus weiskei) following Bunce et al. (2005) and Lerner and Mindell (2005).
Considered by some authors to be a subspecies of Little Eagle (Hieraaetus morphnoides).