Now showing items 1-4 of 4

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

    Rutz, Christian; Klump, Barbara Christina; Komarczyk, Lisa; Leighton, Rosanna; Kramer, Joshua; Wischnewski, Saskia; Sugasawa, Shoko; Morrissey, Michael Blair; James, Richard; St Clair, James; Switzer, Richard A.; Masuda, Bryce M. (2016-09-15) - Journal article
    Only a handful of bird species are known to use foraging tools in the wild1. Amongst them, the New Caledonian crow (Corvus moneduloides) stands out with its sophisticated tool-making skills2, 3. Despite considerable ...
  • Hook tool manufacture in New Caledonian crows : behavioural variation and the influence of raw materials 

    Klump, Barbara Christina; Sugasawa, Shoko; St Clair, James; Rutz, Christian (2015-11-18) - Journal article
    Background: New Caledonian crows use a range of foraging tools, and are the only non-human species known to craft hooks. Based on a small number of observations, their manufacture of hooked stick tools has previously been ...
  • Strong between-site variation in New Caledonian crows' use of hook-tool-making materials 

    St Clair, James; Klump, Barbara Christina; van der Wal, Jessica Eva Megan; Sugasawa, Shoko; Rutz, Christian (2016-06) - Journal article
    Functional tool use requires the selection of appropriate raw materials. New Caledonian crows Corvus moneduloides are known for their extraordinary tool-making behaviour, including the crafting of hooked stick tools from ...
  • Tool bending in New Caledonian crows 

    Rutz, Christian; Sugasawa, Shoko; van der Wal, Jessica Eva Megan; Klump, Barbara Christina; St Clair, James (2016-08) - Journal article
    ‘Betty’ the New Caledonian crow astonished the world, when she ‘spontaneously’ bent straight pieces of garden wire into hooked foraging tools. Recent field experiments have revealed that tool bending is part of the species’ ...