Tool-assisted rhythmic drumming in palm cockatoos shares key elements of human instrumental music Heinsohn, Robert ; Zdenek, Christina N. ; Cunningham, Ross B. ; Endler, John A. ; Langmore, Naomi E. Abstract Publication: Science Advances Pub Date: June 2017 DOI: 10.1126/sciadv.1602399 Bibcode: 2017SciA....3E2399H