Voice
Repeated low whistles, 'we-ow-we', falling then rising in tone. Also issued in a rising series, 'we-ow-we, we-ow-we, we-ow-we, we-ow-we', each phrase slightly higher than last.
Sumatran Ground Cuckoo (Carpococcyx viridis) [XC85992]
by yann muzika from Way Titias, Bukit Barisan Selatan NP, Lampung, Sumatra, Indonesia (song)
Sumatran Ground Cuckoo (Carpococcyx viridis) [XC38431]
by Duncan Wilson from Way Titias, Bukit Barisan Selatan NP, Lampung, Sumatra, Indonesia (call)
Subspecies
Carpococcyx radiceus (Sibley and Monroe 1990, 1993) has been split into Bornean Ground-cuckoo (Carpococcyx radiceus) and Sumatran Ground-cuckoo (Carpococcyx viridis) following Collar and Long (1995).