Voice
A 'pi pi pi pi pi' food call by females. Also a squeeling 'wheep' uttered during aerial display. A harsh chuckling 'chak chak chak' uttered when alarmed.
Black Harrier (Circus maurus) [XC723680]
by id from Hessequa Local Municipality (near Heidelberg), South Cape DC, Western Cape, South Africa (flight call)
Black Harrier (Circus maurus) [XC325480]
by Keith Blomerley from Grahamstown, Western District, Eastern Cape, South Africa (flight call)
Subspecies
No subspecies.
Similar Species
Juvenile and immature with similar-age Pallid Harrier (Circus macrourus) and Montagu's Harrier (Circus pygargus) are much darker and more blotched on underparts than the warm brown streaking of which also have large white underwing panels.
References
See References.