The ability of Asian elephants to interpret human visual attention has been the subject of recent research published in Scientific Reports, led by Hoi-Lam Jim, Shinya Yamamoto, Pakkanut Bansiddhi, and Joshua M. Plotnik.
The study demonstrates that these animals not only rely on olfactory and acoustic signals but also use visual gestures to interact with humans, especially in food solicitation contexts.
Visual communication in a sensory-distinct species
Although vision is not their dominant sense, elephants integrate body and facial signals to interpret human attention.
Unlike primates, whose visual communication has been widely documented, elephants have a sensory structure where smell and hearing predominate. However, previous research on African elephants had already shown that they recognize human attention based on body and facial orientation.
This new study aimed to verify if Asian elephants share this ability, considering their evolutionary divergence 5 to 7 million years ago.
Experimental design and key findings
The experiment was conducted in Thailand with ten captive Asian elephants, aged between 11 and 61 years, at the Anantara Golden Triangle Elephant Camp and Resort.
Each animal participated in four sessions, where the body and facial orientation of the experimenter was manipulated during a food solicitation task.
The results, obtained through a Generalized Linear Mixed-Effects Model, revealed that elephants gestured more when the human’s body and face were oriented towards them. The body orientation was more decisive than the facial, but its effect depended on the face also being directed at the animal. The mere human presence did not increase gesturing.
Cognitive and ecological implications
Human body orientation is key for wild elephants with limited vision.
These findings suggest that Asian elephants do not respond to isolated visual signals but require a combination of body and facial orientation to recognize human attention.
This sensitivity aligns with what is observed in great apes, where the body indicates intention to act and the face signals attentional state.
Given that elephants have limited visual acuity, the human body surface could be a more visible signal, especially in wild contexts, where animals do not approach closely enough to distinguish the face.
Ethics, methodology, and limitations
The study adhered to all ethical standards in Thailand and Japan. Each elephant was accompanied by its mahout, who could interrupt the test if the animal did not wish to continue. The analysis included gesture coding, statistical controls, and inter-observer verification.
Among the limitations, the small sample size, the absence of males, the lack of lateral body condition, and the individual variation in experience with humans stand out, which could affect the generalization to wild populations.
