Circus aeruginosus
Male; brown body, light grey wings with black tips, and brown coverts. Unmarked light grey tail. Female; dark brown with light brown wing-coverts, crown and throat. Tail warm brown and unmarked. Juveniles dark, chocolate-brown, with light buff crown and throat. Young males may show characters of both sexes. Tail fairly long and unforked. Glides with wings raised in shallow V.
Call: A sharp "kwii-uuu" of about a seconds length, rapidly ascending in pitch, and ending on a falling tone.
Wikipedia: map (se also Xeno-canto below)
Birdlife ecology
Sounds:Recorded by Jarek Matusiak,http://www.xeno-canto.org ,CC license
