“…Other species succeeded in tasks involving Stage 5, but not 6. These include rhesus monkeys ( Macaca mulatta , e.g., de Blois and Novak, 1994 ), prosimians (e.g., Deppe et al, 2009 ; Mallavarapu et al, 2013 ), dolphins ( Tursiops truncatus , Jaakkola et al, 2009 ; Singer and Henderson, 2015 ), dogs ( Canis familiaris , e.g., Collier-Baker et al, 2004 ; Fiset and LeBlanc, 2007 , but see also Gagnon and Doré, 1992 , 1993 , 1994 ), macaws ( Ara militaris , Wrape and Hammonds, 2019 ), and cats ( Felis catus , e.g., Doré, 1986 ; Dumas and Doré, 1989 ).…”