Complementary landmarks facilitate ant navigation

Edmund R Hunt*, Christopher Kendall, Emma Stanbury, Ana B Sendova-Franks, Nigel R Franks

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)
334 Downloads (Pure)


Visual landmarks are important navigational aids to many animals, and when more than one is available their juxtaposition can convey valuable new information to a navigator about progress toward a goal, depending on the landmarks’ comparative distinctiveness. We investigated the effect of presenting rock ant colonies (Temnothorax albipennis) with identical horizontal landmarks either side of their route, versus one horizontal landmark paired with a sloping landmark, as they navigated to a new nest site. Our findings suggest that ants can obtain more navigational information from a combination of dissimilar landmarks: the average tortuosity of the route taken between old and new nests was significantly lower when a horizontal landmark was paired with a monotonically downward sloping landmark (the paths were more direct). The impact on available navigational information from the similarity or dissimilarity of nearby landmarks is likely made through more distinctive visual panoramas, and could be an influential factor in individual and collective animal decision-making about which routes are followed. Furthermore, the effect of landmark complementarity may be relevant to a wide range of species, including other insects or birds, and highlights the possibility that there is an intrinsic difference in the informational content of natural vs. artificial environments.

Original languageEnglish
Pages (from-to)702-710
Number of pages9
JournalBehavioural Processes
Early online date6 Mar 2018
Publication statusPublished - 1 Dec 2018


  • Navigation
  • Vision
  • Ants
  • Route landmarks
  • Localisation
  • Temnothorax albipennis


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