All Outputs (4)

Within-species variation eclipses between-species differences in Pan consolation (2025)
Journal Article
Brooker, J. S., Webb, C. E., Kordon, S., de Waal, F. B., & Clay, Z. (2025). Within-species variation eclipses between-species differences in Pan consolation. Evolution and Human Behavior, 46(3), Article 106682. https://doi.org/10.1016/j.evolhumbehav.2025.106682

Empathy and its subcomponents are well documented throughout the animal kingdom, indicating the deep evolutionary origins of this socioemotional capacity. A key behavioural marker of empathy is consolation, or unsolicited bystander affiliation direct... Read More about Within-species variation eclipses between-species differences in Pan consolation.

Bonobos and chimpanzees overlap in sexual behaviour patterns during social tension (2025)
Journal Article
Brooker, J. S., Webb, C. E., van Leeuwen, E. J. C., Kordon, S., de Waal, F. B. M., & Clay, Z. (2025). Bonobos and chimpanzees overlap in sexual behaviour patterns during social tension. Royal Society Open Science, 12(3), Article 242031. https://doi.org/10.1098/rsos.242031

Sexual behaviour during tense social situations is extensively documented in various animals. Bonobos, our closest living relatives alongside chimpanzees, habitually perform genital contacts during social tension, which is thought to enhance cooperat... Read More about Bonobos and chimpanzees overlap in sexual behaviour patterns during social tension.

Factors shaping socio-emotional trajectories in sanctuary-living bonobos: a longitudinal approach (2024)
Journal Article
Kordon, S., Webb, C. E., Brooker, J. S., de Waal, F. B., & Clay, Z. (2024). Factors shaping socio-emotional trajectories in sanctuary-living bonobos: a longitudinal approach. Royal Society Open Science, 11(12), Article 240435. https://doi.org/10.1098/rsos.240435

Early maternal loss can have lasting detrimental effects on primate social development. While many rehabilitation settings provide enriching environments to buffer against such effects in orphans, previous research indicates that young bonobo (Pan pa... Read More about Factors shaping socio-emotional trajectories in sanctuary-living bonobos: a longitudinal approach.

Group-specific expressions of co-feeding tolerance in bonobos and chimpanzees preclude dichotomous species generalizations (2023)
Journal Article
van Leeuwen, E. J., Staes, N., Brooker, J. S., Kordon, S., Nolte, S., Clay, Z., …Stevens, J. M. (2023). Group-specific expressions of co-feeding tolerance in bonobos and chimpanzees preclude dichotomous species generalizations. iScience, 26(12), Article 108528. https://doi.org/10.1016/j.isci.2023.108528

Bonobos are typically portrayed as more socially tolerant than chimpanzees, yet the current evidence supporting such a species-level categorization is equivocal. Here, we used validated group-level co-feeding assays to systematical... Read More about Group-specific expressions of co-feeding tolerance in bonobos and chimpanzees preclude dichotomous species generalizations.