Erica van de Waal

The paper finds that participation in between-group conflicts in wild vervet monkeys is linked to lower long-term cortisol levels, suggesting physiological benefits of cooperative behavior.

This study examines how wolf packs respond to synchronous vs. asynchronous chorus howls from unfamiliar packs, finding that synchronous howls led to greater spatial withdrawal, while asynchronous howls prompted more investigative behavior.

This study examines how lethal wildlife management affects non-target vervet monkeys, finding multiscale behavioral and spatial responses that vary by group, time, and habitat.

This study examines male services in vervet monkeys, finding that certain behaviors predict mating success, supporting reputation-based partner choice as a driver of cooperation.

This study examines risk-taking behavior in wild vervet monkeys, finding consistent individual differences influenced by age, sex, dominance, and hormones, with group-level similarities suggesting social or environmental factors.

This study examines which senses vervet monkeys use to evaluate food, finding vision is most commonly used, with variations by food type and sex, and low rejection rates suggest food familiarity.

This study shows that deep learning models outperform classical methods in behavioural inference from accelerometers, but preprocessing choices significantly affect behaviour-specific accuracy.

The study examines grooming exchanges between male-female vervet monkeys, finding that females initially invest heavily and reduce grooming over time, while males increase frequency after residency, leading to near reciprocity.

The paper examines how postnatal maternal investment shapes sex-specific social development in wild vervet monkeys, finding that maternal age and rank influence offspring sex ratios, survival, and social integration differently in sons and daughters.

This study examines how social networks in juvenile vervet monkeys reorganize during development, showing a shift from kin-based to proximity-based interactions.

This study examines male vervet monkey leadership in high-risk terrain, finding that dominant males lead more often, especially in risky contexts, suggesting cooperative service rather than paternal care.

This study measures social tolerance in wild vervet monkeys using a co-feeding paradigm, finding group differences and the influence of maternal-infant presence.

This study examines anti-snake behavior and snake classification in vervet monkeys through observational and experimental methods, finding that inspection duration varies with snake species but not size, and alarm calling is proximity-dependent.

This study examines interactions between wild vervet monkeys and a robot in a natural setting, finding differences in behavior based on social rank and age.