The Cervo (Piedmontese: Sar or Serv) is a 65-kilometre torrent (a form of seasonally intermittent stream) in the Piedmont region of north-west Italy. It is the principal tributary of the river Sesia, which itself is a significant tributary of the Po.
The name Cervo rather than from the Latin cervus (deer) should come from the Germanic saar (stream or river).
