a soft warbling sound April 10, 2018 In Link “Suspected to mate for life, Raven pairs serenade each other with these gentle “comfort sounds” while bonding.” Listen to the sound and a 1.3 min story about the warble #fauna. corvids. relationships And once you know the world Eiko Kadono awarded the 2018 Hans Christian Andersen Award Related Posts Eiko Kadono awarded the 2018 Hans Christian Andersen Award Style guides customer service wolf study drawing resources