, Volume 55, Issue 2, pp 173–178 | Cite as

Chimpanzee insectivory in the northern half of Uganda’s Rift Valley: do Bulindi chimpanzees conform to a regional pattern?

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Insects are a nutritious food source for many primates. In chimpanzees, insectivory is most prevalent among communities that manufacture tools to harvest social insects, particularly ants and termites. In contrast to other long-term study sites, chimpanzees (Pan troglodytes schweinfurthii) in Budongo Forest and Kibale National Park, Uganda, rarely eat insects and have small foraging tool kits, supporting speculation that infrequent insectivory—technically aided or otherwise—characterises chimpanzees in this part of Uganda’s Rift Valley. To expand the dataset for this region, insect foraging was investigated at Bulindi (25 km from Budongo) over 19 months during two studies in 2007–2008 and 2012–2013. Systematic faecal analysis demonstrated that insectivory is a habitual foraging activity at this site. Overall levels of insect consumption varied considerably across months but were not predicted by monthly changes in rainfall or fruit intake. Unlike their Budongo and Kibale counterparts, Bulindi chimpanzees often consume ants (principally weaver ants, Oecophylla longinoda) and use sticks to dig out stingless bee (Meliponini) ground nests. In other respects, however, insectivory at Bulindi conforms to the pattern observed elsewhere in this region: they do not manufacture ‘fishing’ or ‘dipping’ tools to harvest termites and aggressive or hard-to-access ants (e.g., army ants, Dorylus spp.), despite availability of suitable prey. The Bulindi data lend support to the supposition that chimpanzees in this part of the Rift Valley rarely exploit termites and Dorylus ants, apparently lacking the ‘cultural knowledge’ that would enable them to do so most efficiently (i.e., tool use). The study’s findings contribute to current debates about the relative influence of genetics, environment and culture in shaping regional and local variability in Pan foraging ecology.


Ants Bees Geographic variation Insect foraging Pan troglodytes Seasonality Tool use 


  1. Bogart SL, Pruetz JD (2011) Insectivory of savanna chimpanzees (Pan troglodytes verus) at Fongoli, Senegal. Am J Phys Anthropol 145:11–20PubMedCrossRefGoogle Scholar
  2. Brewer SM, McGrew WC (1990) Chimpanzee use of a tool set to get honey. Folia Primatol 54:100–104PubMedCrossRefGoogle Scholar
  3. Deblauwe I (2009) Temporal variation in insect-eating by chimpanzees and gorillas in southeast Cameroon: extension of niche differentiation. Int J Primatol 30:229–252CrossRefGoogle Scholar
  4. Deblauwe I, Janssens GP (2008) New insights in insect prey choice by chimpanzees and gorillas in southeast Cameroon: the role of nutritional value. Am J Phys Anthropol 135:42–55PubMedCrossRefGoogle Scholar
  5. Field A (2009) Discovering statistics using SPSS. Sage, LondonGoogle Scholar
  6. Gruber T, Muller MN, Reynolds V, Wrangham R, Zuberbühler K (2011) Community-specific evaluation of tool affordances in wild chimpanzees. Sci Rep 1:128PubMedCentralPubMedCrossRefGoogle Scholar
  7. Gruber T, Potts KB, Krupenye C, Byrne MR, Mackworth-Young C, McGrew WC, Reynolds V, Zuberbühler K (2012) The influence of ecology on chimpanzee (Pan troglodytes) cultural behavior: a case study of five Ugandan chimpanzee communities. J Comp Psychol 126:446–457PubMedCrossRefGoogle Scholar
  8. Hashimoto C, Furuichi T, Tashiro Y (2000) Ant dipping and meat eating by wild chimpanzees in the Kalinzu Forest, Uganda. Primates 41:103–108CrossRefGoogle Scholar
  9. Hedges S, McGrew WC (2012) Ecological aspects of chimpanzee insectivory in the Budongo Forest, Uganda. Pan Afr News 19:6–7Google Scholar
  10. Humle T, Matsuzawa T (2002) Ant-dipping among the chimpanzees of Bossou, Guinea, and some comparisons with other sites. Am J Primatol 58:133–148PubMedCrossRefGoogle Scholar
  11. Hunt KD, McGrew WC (2002) Chimpanzees in the dry habitats of Assirik, Senegal and Semliki Wildlife Reserve, Uganda. In: Boesch C, Hohmann G, Marchant LF (eds) Behavioural diversity in chimpanzees and bonobos. Cambridge University Press, Cambridge, pp 35–51CrossRefGoogle Scholar
  12. Kajobe R, Roubik DW (2006) Honey-making bee colony abundance and predation by apes and humans in a Uganda forest reserve. Biotropica 38:210–218CrossRefGoogle Scholar
  13. Kamilar JM, Marshack JL (2012) Does geography or ecology best explain ‘cultural’ variation among chimpanzee communities? J Hum Evol 62:256–260PubMedCrossRefGoogle Scholar
  14. Koops K, McGrew WC, Matsuzawa T (2013) Ecology of culture: do environmental factors influence foraging tool use in wild chimpanzees, Pan troglodytes verus? Anim Behav 85:175–185CrossRefGoogle Scholar
  15. McGrew WC (1974) Tool use by wild chimpanzees in feeding upon driver ants. J Hum Evol 3:501–508CrossRefGoogle Scholar
  16. McGrew WC (1983) Animal foods in the diets of wild chimpanzees (Pan troglodytes): why cross-cultural variation? J Ethol 1:46–61CrossRefGoogle Scholar
  17. McGrew WC (1992) Chimpanzee material culture: implications for human evolution. Cambridge University Press, CambridgeCrossRefGoogle Scholar
  18. McGrew WC, Tutin CEG, Baldwin PJ (1979) Chimpanzees, tools, and termites: cross-cultural comparisons of Senegal, Tanzania, and Rio Muni. Man 14:185–214CrossRefGoogle Scholar
  19. McGrew WC, Marchant LF, Phillips CA (2009) Standardised protocol for primate faecal analysis. Primates 50:363–366PubMedCrossRefGoogle Scholar
  20. McLennan MR (2008) Beleaguered chimpanzees in the agricultural district of Hoima, western Uganda. Primate Conserv 23:45–54CrossRefGoogle Scholar
  21. McLennan MR (2010) Chimpanzee ecology and interactions with people in an unprotected human-dominated landscape at Bulindi, western Uganda. PhD dissertation, Oxford Brookes University, OxfordGoogle Scholar
  22. McLennan MR (2011a) Tool-use to obtain honey by chimpanzees at Bulindi: new record from Uganda. Primates 52:315–322PubMedCrossRefGoogle Scholar
  23. McLennan MR (2011b) Preliminary observations of hand-clasp grooming by chimpanzees at Bulindi, Uganda. Pan Afr News 18:18–20Google Scholar
  24. McLennan MR (2013) Diet and feeding ecology of chimpanzees (Pan troglodytes) in Bulindi, Uganda: foraging strategies at the forest–farm interface. Int J Primatol 34:585–614CrossRefGoogle Scholar
  25. McLennan MR, Plumptre AJ (2012) Protected apes, unprotected forest: composition, structure and diversity of riverine forest fragments and their conservation value in Uganda. Trop Conserv Sci 5:79–103Google Scholar
  26. Nishie H (2011) Natural history of Camponotus ant-fishing by the M group chimpanzees at the Mahale Mountains National Park, Tanzania. Primates 52:329–342PubMedCrossRefGoogle Scholar
  27. O’Malley RC, Power ML (2012) Nutritional composition of actual and potential insect prey for the Kasekela chimpanzees of Gombe National Park, Tanzania. Am J Phys Anthropol 149:493–503PubMedCrossRefGoogle Scholar
  28. Pascual-Garrido A, Umaru B, Allon O, Sommer V (2013) Apes finding ants: predator–prey dynamics in a chimpanzee habitat in Nigeria. Am J Primatol 75:1231–1244PubMedGoogle Scholar
  29. Raubenheimer D, Rothman JM (2013) Nutritional ecology of entomophagy in humans and other primates. Annu Rev Entomol 58:141–160PubMedCrossRefGoogle Scholar
  30. Reynolds V (2005) The chimpanzees of the Budongo Forest: ecology, behaviour, and conservation. Oxford University Press, OxfordCrossRefGoogle Scholar
  31. Sanz CM, Morgan DB (2011) Elemental variation in the termite fishing of wild chimpanzees (Pan troglodytes). Biol Lett 7:634–637PubMedCentralPubMedCrossRefGoogle Scholar
  32. Schöning C, Ellis D, Fowler A, Sommer V (2007) Army ant prey availability and consumption by chimpanzees (Pan troglodytes vellerosus) at Gashaka (Nigeria). J Zool 271:125–133CrossRefGoogle Scholar
  33. Schöning C, Humle T, Möbius Y, McGrew WC (2008) The nature of culture: technological variation in chimpanzee predation on army ants revisited. J Hum Evol 55:48–59PubMedCrossRefGoogle Scholar
  34. Sherrow HM (2005) Tool use in insect foraging by the chimpanzees of Ngogo, Kibale National Park, Uganda. Am J Primatol 65:377–383PubMedCrossRefGoogle Scholar
  35. Stanford CB, Gambaneza C, Nkurunungi JB, Goldsmith ML (2000) Chimpanzees in Bwindi-Impenetrable National Park, Uganda, use different tools to obtain different types of honey. Primates 41:337–341CrossRefGoogle Scholar
  36. Tutin CEG, Fernandez M (1992) Insect-eating by sympatric lowland gorillas (Gorilla g. gorilla) and chimpanzees (Pan t. troglodytes) in the Lopé Reserve, Gabon. Am J Primatol 28:29–40CrossRefGoogle Scholar
  37. Watts DP (2008) Tool use by chimpanzees at Ngogo, Kibale National Park, Uganda. Int J Primatol 29:83–94CrossRefGoogle Scholar
  38. Watts DP, Potts KB, Lwanga JS, Mitani JC (2012) Diet of chimpanzees (Pan troglodytes schweinfurthii) at Ngogo, Kibale National Park, Uganda, 1. Diet composition and diversity. Am J Primatol 74:114–129PubMedCrossRefGoogle Scholar
  39. Webster TH, McGrew WC, Marchant LF, Payne CLR, Hunt KD (2012) ‘The other faunivory’ at Semliki, Uganda: is there evidence for a ‘savanna chimpanzee’ pattern of insectivory? Am J Phys Anthropol 147:299Google Scholar
  40. Yamagiwa J, Basabose AK (2009) Fallback foods and dietary partitioning among Pan and Gorilla. Am J Phys Anthropol 140:739–750PubMedCrossRefGoogle Scholar

Copyright information

© Japan Monkey Centre and Springer Japan 2014

Authors and Affiliations

  1. 1.Faculty of Humanities and Social Sciences, Anthropology Centre for Conservation, Environment and DevelopmentOxford Brookes UniversityOxfordUK

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