• Discovery of species-wide tool use in the Hawaiian crow

      Rutz, Christian; Klump, Barbara C.; Komarczyk, Lisa; Leighton, Rosanna; Kramer, Joshua; Wischnewski, Saskia; Sugasawa, Shoko; Morrissey, Michael B.; James, Richard; St Clair, James J. H.; et al. (2016)
      ...Here we show that another tropical corvid, the ‘Alalā (C. hawaiiensis; Hawaiian crow), is a highly dexterous tool user. Although the ‘Alalā became extinct in the wild in the early 2000s, and currently survives only in captivity5, at least two lines of evidence suggest that tool use is part of the species’ natural behavioural repertoire: juveniles develop functional tool use without training, or social input from adults; and proficient tool use is a species-wide capacity....