Animal Cognition

, 9:317 | Cite as

A New Caledonian crow (Corvus moneduloides) creatively re-designs tools by bending or unbending aluminium strips

Original Article

Abstract

Previous observations of a New Caledonian crow (Corvus moneduloides) spontaneously bending wire and using it as a hook [Weir et al. (2002) Science 297:981] have prompted questions about the extent to which these animals ‘understand’ the physical causality involved in how hooks work and how to make them. To approach this issue we examine how the same subject (“Betty”) performed in three experiments with novel material, which needed to be either bent or unbent in order to function to retrieve food. These tasks exclude the possibility of success by repetition of patterns of movement similar to those employed before. Betty quickly developed novel techniques to bend the material, and appropriately modified it on four of five trials when unbending was required. She did not mechanically apply a previously learned set of movements to the new situations, and instead sought new solutions to each problem. However, the details of her behaviour preclude concluding definitely that she understood and planned her actions: in some cases she probed with the unmodified tools before modifying them, or attempted to use the unmodified (unsuitable) end of the tool after modification. Gauging New Caledonian crows’ level of understanding is not yet possible, but the observed behaviour is consistent with a partial understanding of physical tasks at a level that exceeds that previously attained by any other non-human subject, including apes.

Keywords

New Caledonian crows Tool use Tool modification Planning Folk physics 

Supplementary material

10071_2006_52_MOESM1_ESM.pdf (188 kb)
Table S1: Trial-by-trial description of Experiment 1. ‘Trial code’ summarises the result of the trial (O = own tool; U = unmodified strip; M = modified strip; f = failure (to get food); s = success). ‘Duration’ is the length of time from first interacting with the apparatus to retrieving food (minutes : seconds). ‘Tool dimensions’ gives the length and width of the tool at the start of the trial (mm).
10071_2006_52_MOESM2_ESM.pdf (79 kb)
Table S2: Trial-by-trial description of Experiment 2. Columns as above, except ‘Success’ which indicates whether the subject successfully retrieved the food (y = yes; n = no)
10071_2006_52_MOESM3_ESM.pdf (88 kb)
Table S3: Trial-by-trial description of Experiment 3. Columns as above.
10071_2006_52_MOESM4_ESM.pdf (8.4 mb)
Fig. S4: Final tool shapes in Experiment 1. In each photo, the number refers to the trial on which the tool was made, and the scale bar represents 3 cm.

Video S5: Video of Trial 3, Experiment 1. This shows the first trial on which the subject modified the aluminium strips. See Table S1 for a detailed description of the trial. Format: Windows Media Video; duration: 6min 45s.

Video S6: Video of Trial 32, Experiment 1. This shows an example of the ‘bend’ technique that the subject developed for modifying the aluminium strips, towards the end of the experiment. See Table S1 for a detailed description of the trial. Format: Windows Media Video; duration: 21s.

Video S7: Video of Trial 3, Experiment 3. This shows the first time the subject unbent the aluminium strip. After food-retrieval, the unbending action is replayed in slow-motion. The clip starts 4min 7s into the trial, after the subject had already probed with the tool 4 times (for a total of 16s), but before she had modified it. After modification, there is a break in the clip during which the subject probed for the food 4 times (for 50s), twice with each end of the tool. See Table S3 for a detailed description of the trial. Format: Windows Media Video; duration: 55s.

Video S8: Video of Trial 4, Experiment 3. On this trial the subject unbent the tool using a similar action to Trial 3. As with Video S7, the clip ends with a replay of the unbending action in slow-motion. The clip starts 3min 15s into the trial, after the subject had already probed with the tool 7 times (for 37s), but before she had modified it. See Table S3 for a detailed description of the trial. Format: Windows Media Video; duration: 51s.

References

  1. Anderson JR (2001) [Review of Folk physics for apes: The chimpanzee's theory of how the world works, by Daniel Povinelli]. Anim Behav 61:1042–1043 DOI 10.1006/anbe.2001.1694Google Scholar
  2. Anderson JR, Henneman MC (1994) Solutions to a tool-use problem in a pair of Cebus apella. Mammalia 58:351–361CrossRefGoogle Scholar
  3. Biro D, Inoue-Nakamura N, Tonooka R, Yamakoshi G, Sousa C, Matsuzawa T (2003) Cultural innovation and transmission of tool use in wild chimpanzees: evidence from field experiments. Anim Cogn 6:213–223 DOI 10.1007/s10071-003-0183-xGoogle Scholar
  4. Butler AB, Manger PR, Lindahl BIB, Arhem P (2005) Evolution of the neural basis of consciousness: a bird-mammal comparison. BioEssays 27:923–936 DOI 10.1002/bies.20280Google Scholar
  5. Chappell J, Kacelnik A (2002) Tool selectivity in a non-mammal, the New Caledonian crow (Corvus moneduloides). Anim Cogn 5:71–78 DOI 10.1007/s10071-002-0130-2Google Scholar
  6. Chappell J, Kacelnik A (2004) Selection of tool diameter by New Caledonian crows Corvus moneduloides. Anim Cogn 7:121–127 DOI 10.1007/s10071-003-0202-yGoogle Scholar
  7. de Kloet ER, Oitzl MS, Joels M (1999) Stress and cognition: are corticosteroids good or bad guys? Trends Neurosci 22:422–426PubMedCrossRefGoogle Scholar
  8. Defeyter MA, German TP (2003) Acquiring an understanding of design: evidence from children's insight problem solving. Cognition 89:133–155 DOI 10.1016/S0010-0277(03)00098-2Google Scholar
  9. Emery NJ, Clayton NS (2004) The mentality of crows: convergent evolution of intelligence in corvids and apes. Science 306:1903–1907 DOI 10.1126/science.1098410Google Scholar
  10. Emery NJ, Dally JM, Clayton NS (2004) Western scrub-jays (Aphelocoma californica) use cognitive strategies to protect their caches from thieving conspecifics. Anim Cogn 7:37–44 DOI 10.1007/s10071-003-0178-7Google Scholar
  11. Epstein R, Kirshnit CE, Lanza RP, Rubin LC (1984) Insight in the pigeon: antecedents and determinants of an intelligent performance. Nature 308:61–62PubMedCrossRefGoogle Scholar
  12. Goodall J (1986) The chimpanzees of Gombe: patterns of behavior. Harvard University Press, Cambridge, MAGoogle Scholar
  13. Griffin DR, Speck GB (2004) New evidence of animal consciousness. Anim Cogn 7:5–18 DOI 10.1007/s10071-003-0203-xGoogle Scholar
  14. Hauser MD (2001) Elementary, my dear chimpanzee. Science 291:440–441 DOI 10.1126/science.1057937Google Scholar
  15. Higuchi H (1986) Bait-fishing by the green-backed heron Ardeola striata in Japan. Ibis 128:285–290Google Scholar
  16. Higuchi H (1988) Individual differences in bait fishing by the green-backed heron Ardeola striata associated with territory quality. Ibis 130:39–44Google Scholar
  17. Hirata S, Celli ML (2003) Role of mothers in the acquisition of tool-use behaviours by captive infant chimpanzees. Anim Cogn 6:235–244 DOI 10.1007/s10071-003-0187-6Google Scholar
  18. Hunt GR (1996) Manufacture and use of hook-tools by New Caledonian crows. Nature 379:249–251 DOI 10.1038/379249a0Google Scholar
  19. Hunt GR (2000) Human-like, population-level specialization in the manufacture of pandanus tools by New Caledonian crows Corvus moneduloides. Proc R Soc Lond B 267:403–413 DOI 10.1098/rspb.2000.1015Google Scholar
  20. Hunt GR, Gray RD (2002) Species-wide manufacture of stick-type tools by New Caledonian crows. Emu 102:349–353 DOI 10.1071/MU01056Google Scholar
  21. Hunt GR, Gray RD (2003) Diversification and cumulative evolution in New Caledonian crow tool manufacture. Proc R Soc Lond B 270:867–874 DOI 10.1098/rspb.2002.2299Google Scholar
  22. Hunt GR, Gray RD (2004a) The crafting of hook tools by wild New Caledonian crows. Proc R Soc Lond B 271(Suppl):S88–S90 DOI 10.1098/rsbl.2003.0085Google Scholar
  23. Hunt GR, Gray RD (2004b) Direct observations of pandanus-tool manufacture and use by a New Caledonian crow (Corvus moneduloides). Anim Cogn 7:114–120 DOI 10.1007/s10071-003-0200-0Google Scholar
  24. Hunt GR, Rutledge RB, Gray RD (2006) The right tool for the job: what strategy do wild New Caledonian crows use? Anim Cogn, DOI 10.1007/s10071-006-0047-2Google Scholar
  25. Jarvis ED, Güntürkün O, Bruce L, Csillag A, Karten H, Kuenzel W, Medina L, Paxinos G, Perkel DJ, Shimizu T, Striedter G, Wild JM, Ball GF, Dugas-Ford J, Durand SE, Hough GE, Husband S, Kubikova L, Lee DW, Mello CV, Powers A, Siang C, Smulders TV, Wada K, White SA, Yamamoto K, Yu J, Reiner A, Butler AB (2005) Avian brains and a new understanding of vertebrate brain evolution. Nat Rev Neurosci 6:151–159 DOI 10.1038/nrn1606Google Scholar
  26. Kacelnik A, Chappell J, Weir AAS, Kenward B (2006) Cognitive adaptations for tool-related behaviour in New Caledonian crows. In: Wasserman EA, Zentall TR (eds) Comparative cognition: experimental explorations of animal intelligence. Oxford University Press, Oxford, pp 515–528Google Scholar
  27. Kenward B, Weir AAS, Rutz C, Kacelnik A (2005) Tool manufacture by naive juvenile crows. Nature 433:121 DOI 10.1038/433121aGoogle Scholar
  28. Kenward B, Rutz C, Weir AAS, Kacelnik A (in press) Development of tool use in New Caledonian crows (Corvus moneduloides): stereotyped action patterns and social influence. Anim BehavGoogle Scholar
  29. Klüver H (1937) Re-examination of implement-using behavior in a Cebus monkey after an interval of three years. Acta Psychologica 2:347–397CrossRefGoogle Scholar
  30. Köhler W (1925) The mentality of apes. Harcourt Brace, LondonGoogle Scholar
  31. Lockman JJ (2000) A perception-action perspective on tool use development. Child Dev 71:137–144 DOI 10.1111/1467-8624.00127Google Scholar
  32. Lonsdorf EV (2005) Sex differences in the development of termite-fishing skills in the wild chimpanzees, Pan troglodytes schweinfurthii, of Gombe National Park, Tanzania. Anim Behav 70:673–683 DOI 10.1016/j.anbehav.2004.12.014Google Scholar
  33. Lonsdorf EV (2006) What is the role of mothers in the acquisition of termite-fishing behaviors in wild chimpanzees (Pan troglodytes schweinfurthii)? Anim Cogn 9:36–46 DOI 10.1007/s10071-005-0002-7Google Scholar
  34. Lonsdorf EV, Eberly LE, Pusey AE (2004) Sex differences in learning in chimpanzees. Nature 428:715–716 DOI 10.1038/428715aGoogle Scholar
  35. Lucas JR (1982) The biophysics of pit construction by antlion larvae (Myrmeleon, Neuroptera). Anim Behav 30:651–664Google Scholar
  36. Machado A, Silva FJ (2003) ``You can lead an ape to a tool, but …: A review of Povinelli's Folk physics for apes: the chimpanzee's theory of how the world works.'' J Exp Anal Behav 79:267–286CrossRefGoogle Scholar
  37. Mackintosh NJ (1994) Animal learning and cognition. Academic Press, San Diego, LondonGoogle Scholar
  38. McGrew WC (1992) Chimpanzee material culture: implications for human evolution. Cambridge University Press, New York, NYGoogle Scholar
  39. Povinelli DJ (ed) (2000) Folk physics for apes. Oxford University Press, Oxford, UK.Google Scholar
  40. Povinelli DJ, Reaux JE, Theall LA, Giambrone S (2000a) The rope, hook, touching-stick, and related problems: the question of physical connection. In: Povinelli DJ (ed) Folk physics for apes. Oxford University Press, Oxford, UK, pp 206–253Google Scholar
  41. Povinelli DJ, Reaux JE, Theall LA, Giambrone S (2000b) The question of tool modification. In: Povinelli DJ (ed) Folk physics for apes. Oxford University Press, Oxford, UK, pp 271–296Google Scholar
  42. Povinelli DJ, Theall LA, Reaux JE, Giambrone S (2000c) The tool-insertion problem: the question of shape. In: Povinelli DJ (ed) Folk physics for apes. Oxford University Press, Oxford, UK, pp 173–205Google Scholar
  43. Reaux JE, Povinelli DJ (2000) The trap-tube problem. In: Povinelli DJ (ed) Folk physics for apes. Oxford University Press, Oxford, UK, pp 108–131Google Scholar
  44. Ricklefs RE (2004) The cognitive face of avian life histories: the 2003 Margaret Morse Nice lecture. Wilson Bull 116:119–133CrossRefGoogle Scholar
  45. Sanz C, Morgan D, Gulick S (2004) New insights into chimpanzees, tools, and termites from the Congo basin. Am Nat 164:567–581PubMedCrossRefGoogle Scholar
  46. Schwartz B, Wasserman EA, Robbins SJ (2002) Psychology of learning and behavior, 5th edn. W.W. Norton, New York, NY; LondonGoogle Scholar
  47. Silva FJ, Page DM, Silva KM (2005) Methodological-conceptual problems in the study of chimpanzees’ folk physics: how studies with adult humans can help. Learn Behav 33:47–58PubMedGoogle Scholar
  48. Spence KW (1938) Gradual versus sudden solution of discrimination problems by chimpanzees. J Comp Psychol 25:213–224CrossRefGoogle Scholar
  49. Sterelny K (2003) Charting control-space: comments on Susan Hurley's ‘Animal action in the space of reasons’. Mind Lang 18:257–265CrossRefGoogle Scholar
  50. Sugiyama Y (1985) The brush-stick of chimpanzees found in south-west Cameroon and their cultural characteristics. Primates 26:361–374Google Scholar
  51. Sugiyama Y (1997) Social tradition and the use of tool-composites by wild chimpanzees. Evol Anthropol 6:23–27CrossRefGoogle Scholar
  52. Tebbich S, Bshary R (2004) Cognitive abilities related to tool use in the woodpecker finch, Cactospiza pallida. Anim Behav 67:689–697 DOI 10.1016/j.anbehav.2003.08.003Google Scholar
  53. Thelen E (1979) Rhythmical stereotypies in normal human infants. Anim Behav 27:699–715PubMedCrossRefGoogle Scholar
  54. Thelen E (1981) Rhythmical behavior in infancy: an ethological perspective. Dev Psychol 17:237–257CrossRefGoogle Scholar
  55. Tonooka R (2001) Leaf-folding behavior for drinking water by wild chimpanzees (Pan troglodytes verus) at Bossou, Guinea. Anim Cogn 4:325–334 DOI 10.1007/s100710100110Google Scholar
  56. Visalberghi E, Trinca L (1989) Tool use in capuchin monkeys: distinguishing between performing and understanding. Primates 30:511–521CrossRefGoogle Scholar
  57. Visalberghi E, Limongelli L (1994) Lack of comprehension of cause–effect relations in tool-using capuchin monkeys (Cebus apella). J Comp Psychol 108:15–22PubMedCrossRefGoogle Scholar
  58. Visalberghi E, Fragaszy DM, Savage-Rumbaugh ES (1995) Performance in a tool-using task by common chimpanzees (Pan troglodytes), bonobos (Pan paniscus), an orangutan (Pongo pygmaeus), and capuchin monkeys (Cebus apella). J Comp Psychol 109:52–60PubMedCrossRefGoogle Scholar
  59. Watanabe S, Huber L (2006) Animal logics: decisions in the absence of human language. Anim Cogn, DOI 10.1007/s10071-006-0043-6Google Scholar
  60. Weir AAS, Chappell J, Kacelnik A (2002) Shaping of hooks in New Caledonian crows. Science 297:981 DOI 10.1126/science.1073433Google Scholar
  61. Weir AAS, Kenward B, Chappell J, Kacelnik A (2004) Lateralization of tool use in New Caledonian crows (Corvus moneduloides). Proc R Soc Lond B 271(Suppl):S344–S346 DOI 10.1098/rsbl.2004.0183Google Scholar
  62. Whiten A (2001) Tool tests challenge chimpanzees. Nature 409:133 DOI 10.1038/35051638Google Scholar
  63. Whiten A (2005) The second inheritance system of chimpanzees and humans. Nature 437:52–55 DOI 10.1038/nature04023Google Scholar
  64. Whiten A, Horner V, de Waal FBM (2005) Conformity to cultural norms of tool use in chimpanzees. Nature 437:737–740 DOI 10.1038/nature04047Google Scholar
  65. Whiten A, Goodall J, McGrew WC, Nishida T, Reynolds V, Sugiyama Y, Tutin CEG, Wrangham RW, Boesch C (1999) Cultures in chimpanzees. Nature 399:682–685 DOI 10.1038/21415Google Scholar
  66. Whiten A, Goodall J, McGrew WC, Nishida T, Reynolds V, Sugiyama Y, Tutin CEG, Wrangham RW, Boesch C (2001) Charting cultural variation in chimpanzees. Behaviour 138:1481–1516 DOI 10.1163/156853901317367717Google Scholar
  67. Wilson B, Mackintosh NJ, Boakes RA (1985) Transfer of relational rules in matching and oddity learning by pigeons and corvids. Q J Exp Psychol B 37:313–332Google Scholar
  68. Zorina ZA (2005) Animal intelligence: laboratory experiments and observations in nature. Zool Zhurnal 84:134–148Google Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of ZoologyOxfordUK

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