Primate Behavior and Ecology

Pigeons rapidly transmit information about predator location through gaze-following

Pigeons use gaze-following to detect predator location in flocks, responding to the duration of conspecific gaze rather than other cues.

Nested Male Reproductive Strategies in a Tolerant Multilevel Primate Society

The paper investigates male reproductive strategies in Guinea baboons, finding that reproductive success is more influenced by age and female associations than dominance.

Assessing group size and the demographic composition of unhabituated northern muriqui (Brachyteles hypoxanthus) using non-invasive biomonitoring

The paper estimates population size and demographic composition of northern muriquis using non-invasive methods and compares their cost-efficiency.

Holding a Steady Look at the Human Eye: Rebuttal to Critiques of the Gaze-Signalling and Cooperative Eye Hypotheses

The paper reevaluates evidence for the Cooperative Eye Hypothesis and Gaze-Signalling Hypothesis, finding human eye morphology remains unique and advantageous for social communication.

Living with urban fear: vervet monkey response to an evolutionarily new predator

This study examines how vervet monkeys respond to domestic dogs, an evolutionarily new predator, showing they use ingrained behaviors and spatial memory but fail to adapt to new risk labels.

Ecological risk-taking across age in Barbary macaques

This study examines age-related changes in risk-taking behavior in Barbary macaques using an experimental paradigm with varying risk and reward combinations.

Asian elephants (Elephas maximus) recognise human visual attention from body and face orientation

This study shows that Asian elephants respond to human visual attention cues by gesturing more when experimenters face and body are oriented towards them.

Subadult macaws (Ara glaucogularis) copy better than adults but are less likely to imitate in problem-solving tasks

This study shows subadult macaws copy non-preferred actions better than adults in problem-solving tasks but are less likely to imitate specific actions, suggesting age-related differences in social learning.

An updated vocal repertoire of wild adult bonobos (Pan paniscus )

The paper quantitatively describes the vocal repertoire of wild bonobos using machine learning to classify 11 acoustically distinct call types from over 1500 calls.

Social Tolerance and Innovation in Capuchins: socially more tolerant brown capuchins are better problem-solvers than less tolerant white-faced capuchins

This study compares social tolerance and problem-solving abilities between brown and white-faced capuchin monkeys, finding that brown capuchins are more socially tolerant and better at solving novel food puzzles.

Third-party imitation is not restricted to humans

This study shows undomesticated blue-throated macaws can imitate intransitive actions after observing others, indicating third-party imitation exists outside humans.

Rank-biased access to females in the likely fertile period despite comparable copulation rates in male bonobos at Wamba

The paper examines male bonobo mating strategies, finding that higher-ranking males have biased access to fertile females despite similar overall copulation rates across ranks.

Diverse and Flexible Strategies Enable Successful Cooperation in Marmoset Dyads

This study shows marmosets use flexible, cognitively driven cooperation strategies in dyads, adapting based on partner identity and social relationships.

The Effect of Human Presence and Activity Type on Innovative Problem-Solving of Urban Eurasian Red Squirrels.

This study examines how human presence and activity types affect innovative problem-solving in urban Eurasian red squirrels, finding negative impacts on success rates and latency.

Eight years of social and individual learning synergistically shape orangutan diet profiles

The paper analyzes social and individual learning in wild orangutans over eight years, finding that social learning is more frequent and synergistically shapes diet profiles with individual learning.

The coevolution of encephalization and manual dexterity in hominins and other primates

This study examines the co-evolution of brain size and thumb length across primates, finding a strong association and showing hominins follow the same evolutionary trend.

Risk-taking incentives predict aggression heuristics in female gorillas

This study shows that female gorillas adjust their aggression towards higher or lower-ranking groupmates based on social context and individual conditions like pregnancy.

Spatio-temporal dynamics of ingroup interactions in macaques

This study examines spatial occupancy patterns in macaques, finding that social hierarchy and affiliation influence their spatial distribution and interactions.

Female Asian elephant clans have age-based order but weak dominance resolution

This study examines dominance relationships in female Asian elephant clans, finding a weakly structured age-based dominance order compared to African savannah elephants.

The ontogeny of play in a highly cooperative monkey, the common marmoset

This study examines the development of play behavior in common marmoset infants, showing that social play increases with age and that adults remain important play partners despite the presence of twins.

Spontaneous eye blinking is influenced by activity, synchronized with attentional breakpoints, but not modulated by social relevance in Barbary macaques

This study examines eye blinking in Barbary macaques, finding lower blink rates during grooming compared to resting, linked to attentional demands, but not social relevance.

The Social Switchboard: Context and Rank Shapes Behavioural and Neural Responses During Macaque Decision-Making

This study shows that social context and rank influence decision-making, attention, and brain activity in macaques during social interactions.

Many facets of self-directed behaviours in macaques

This study examines self-directed behaviours in macaques to understand their relationship with social dynamics and anxiety-like states, finding differential responses rather than a single anxiety dimension.

Spatial proximity and dyadic social relationships affect ungulate behavioral synchrony

The paper investigates how sex, social relationships, and spatial proximity influence behavioral synchrony and fission events in feral cattle.

Uncovering variation in social tolerance among wild vervet monkeys through a novel co-feeding paradigm

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

Tonkean macaques do not prefer the helper or the hinderer in the hill paradigm

The study tests Tonkean macaques' preference between helper and hinderer agents in the hill paradigm and finds no preference, suggesting low attention to stimuli.

Material matters: raw material influences stone tool performance in capuchin monkeys

This study examines how different raw materials affect the performance and durability of percussive stone tools used by capuchin monkeys to crack nuts.

Contrasting Impacts of the Anthropogenic Environment on the Diet of Long-tailed Macaques (Macaca fascicularis) in Southeast Asia

This study examines how anthropogenic environments affect the diet of long-tailed macaques in Singapore and Bali, finding differing impacts on diet diversity and stability.

Kinematics and morphological correlates of descent strategies in arboreal mammals suggest early upright postures in euprimates

The paper analyzes descent strategies in arboreal mammals to infer upright postures in early primates.

Japanese macaques (Macaca fuscata) adjust inter-individual distance based on aggressiveness rather than rank differences

This study finds that Japanese macaques adjust their flight initiation distance based on a dominant's aggressiveness, not rank differences.