Now showing items 1-8 of 8

  • Calibrating animal-borne proximity loggers 

    Rutz, Christian; Morrissey, Michael Blair; Burns, Zackory; Burt, John; Otis, Brian; St Clair, James; James, Richard (2015-06) - Journal article
    1. Growing interest in the structure and dynamics of animal social networks has stimulated efforts to develop automated tracking technologies that can reliably record encounters in free-ranging subjects. A particularly ...
  • Context-dependent 'safekeeping' of foraging tools in New Caledonian crows 

    Klump, Barbara Christina; van der Wal, Jessica Eva Megan; St Clair, James; Rutz, Christian (2015-05-20) - Journal article
    Several animal species use tools for foraging, such as sticks to extract embedded arthropods and honey, or stones to crack open nuts and eggs. While providing access to nutritious foods, these behaviours may incur significant ...
  • 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 ...
  • Experimental resource pulses influence social-network dynamics and the potential for information flow in tool-using crows 

    St Clair, James; Burns, Zackory; Bettaney, Elaine; Morrissey, Michael Blair; Otis, Brian; Ryder, Brandt; Fleischer, Robert; James, Richard; Rutz, Christian (2015-11-03) - Journal article
    Social-network dynamics have profound consequences for biological processes such as information flow, but are notoriously difficult to measure in the wild. We used novel transceiver technology to chart association patterns ...
  • 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 ...
  • Processing and visualising association data from animal-borne proximity loggers 

    Bettaney, Elaine; James, Richard; St Clair, James; Rutz, Christian (2015-08-29) - Journal article
    Background With increasing interest in animal social networks, field biologists have started exploring the use of advanced tracking technologies for mapping social encounters in free-ranging subjects. Proximity logging, ...
  • 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’ ...