02/24/2024
Fascinating article!
https://www.cell.com/current-biology/fulltext/S0960-9822(07)02066-0?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0960982207020660%3Fshowall%3Dtrue
The ability to classify members of a predatory species into subgroups offers an adaptive advantage when the predator exists in subpopulations that present different degrees of danger. Different human ethnic groups present varying risks to elephants, and we have shown that the elephants of Amboseli National Park do classify and respond to these ethnic groups differently. Elephants reacting to information in odors showed most fear to Maasai-worn cloths, running away quickly and downwind until they reached tall elephant grass, remaining tense and alert even after reaching the protection of this denser habitat. The same elephants showed the least fear to the unworn cloths. They were slightly wary of the scent of these cloths, generally moving away, but much more slowly. They did not seek taller grass in which to hide, and they soon relaxed. The response to scenting cloths worn by Kamba men was between these two extremes. When presented with visual cues associated with Maasai men, in the absence of olfactory cues, the elephants showed aggression. The fear of Maasai men was not specific to elephants with personal experience of spearing: Elephants with low or no experience of spearing showed similar reactions. However, for those with personal experience of spearing, the episode apparently affected individuals in varied ways.
Animals can benefit from classifying predators or other dangers into categories, tailoring their escape strategies to the type and nature of the risk. Studies of alarm vocalizations have revealed various levels of sophistication in classification [1–5]. In many taxa, reactions to danger are inflex...