Leading a conspecific away from food in ravens (Corvus corax)?

  title={Leading a conspecific away from food in ravens (Corvus corax)?},
  author={Thomas Bugnyar and Kurt Kotrschal},
  journal={Animal Cognition},
Active misleading of conspecifics has been described as a social strategy mainly for primates. Here we report a raven leading a competitor away from food in a social foraging task. Four individuals had to search and compete for hidden food at color-marked clusters of artificial food caches. At the beginning of the experiment, a subordinate male found and exploited the majority of the food. As a result, the dominant male displaced him from the already opened boxes. The subordinate male then… 
Decision time modulates social foraging success in wild common ravens, Corvus corax
Investigating which factors underline kleptoparasitism avoidance is a promising scenario to test specific predictions derived from these hypotheses and concludes that individuals benefit from applying cognition to such decision‐making, independently of age class.
Mountain chickadees discriminate between potential cache pilferers and non-pilferers
  • V. Pravosudov
  • Biology
    Proceedings of the Royal Society B: Biological Sciences
  • 2007
Chickadees may be able to recognize potential cache thieves, both conspecific and heterospecific, and adjust their caching strategies to minimize potential cache pilferage and chickadees appear to discriminate between caching sites that can or cannot be seen by observers, which may allow them to control visual information available to potential pilferers.
Pilfering ravens, Corvus corax, adjust their behaviour to social context and identity of competitors
It is demonstrated that ravens selectively alter their pilfer behaviour with those individuals that are likely to defend the caches (storers) and support the interpretation that they are deceptively manipulating the others' behaviour.
Chimpanzee uses manipulative gaze cues to conceal and reveal information to foraging competitor
The results substantiate descriptive reports of how chimpanzees use gaze to manipulate others, and are the first quantitative data to identify behavioral mechanisms of tactical deception.
Context‐dependent responses of food‐hoarding to competitors in Apodemus peninsulae: implications for coexistence among asymmetrical species
It is suggested that subordinate species contextually regulate their food‐hoarding strategies according to different competitors, promoting species coexistence among sympatric animals that have asymmetrical food competition.
Cooperative problem solving in rooks (Corvus frugilegus)
Results may indicate that cooperation in chimpanzees is underpinned by more complex cognitive processes than that in rooks, which may arise from the fact that while both chimpanzees and rooks form cooperative alliances, chimpanzees, but not rooking, live in a variable social network made up of competitive and cooperative relationships.
Variation in withholding of information in three monkey species
The results supported the predictions based on interspecific differences in the strictness of the dominance hierarchy and the degree of fission–fusion dynamics, with the former constraining the subjects' tendency to approach the box and the latter affecting the subjects’ tendency to wait for the appropriate situation to retrieve the food.
Chickadees are selfish group members when it comes to food caching


Influence of competitors on caching behaviour in the common raven,Corvus corax
It is shown that in the presence of competitors, common ravens instead cached further from the food source, provided they had space into which they could escape from the sight of the competitors.
Chimpanzees know what conspecifics do and do not see
It is suggested that chimpanzees know what conspecifics can and cannot see, and, furthermore, that they use this knowledge to devise effective social-cognitive strategies in naturally occurring food competition situations.
Do tufted capuchin monkeys (Cebus apella) spontaneously deceive opponents? A preliminary analysis of an experimental food-competition contest between monkeys
It is suggested that operationally defined spontaneous deceptive behaviors in monkeys can be analyzed with experimental procedures such as those used here, and that the results do not clearly indicate spontaneous deception.
Do chimpanzees know what conspecifics know?
Chimpanzees know what conspecifics have and have not seen (do and do not know), and that they use this information to devise effective social-cognitive strategies.
Social tactics of pigs in a competitive foraging task: the ‘informed forager’ paradigm
This study extended the study of animal social tactics to the domestic pig, Sus scrofa, by using an experimental analogue of natural foraging skills, the 'informed forager' paradigm, and shows that pigs are able to remember and relocate the food site and exploit the knowledge of others by following them to a food source.
Foraging pigs alter their behaviour in response to exploitation
Abstract When food finders are exploited by others, but cannot themselves switch to scrounging or leave their foraging group, other behavioural adaptations should be favoured. Tactical deception in
Social learning in common ravens,Corvus corax
Even though observers initially obtained a considerable amount of reward produced by the models, scrounging evidently did not inhibit learning, and both stimulus enhancement and motor imitation are discussed as possible learning mechanisms.
Observational learning and the raiding of food caches in ravens, Corvus corax: is it ‘tactical’ deception?
Abstract Group-foraging ravens scatter-hoard when they are competing for food and, to some extent, also raid the caches made by others. We investigated the effects of observational spatial memory on
Tactics to obtain a hidden food item in chimpanzee pairs (Pan troglodytes)
Tactics and counter-tactics thus developed through the interaction between the witness and the witness-of-witness, illustrating the high social intelligence of chimpanzees.
Birds that ‘cry wolf’
  • C. Munn
  • Environmental Science
  • 1986
Two species of flycatching birds in Amazonia, Lanio versicolor and Thamnomanes schistogynus, are studied, which lead flocks of mixed species in the canopy and understorey of the forest, respectively, and act as sentinels, giving alarm calls at the approach of bird-eating hawks.