The field of animal cognition has advanced rapidly in the last 25 years. Through careful and
creative studies of animals in captivity and in the wild, we have gained critical insights into …

Consumer and predator foraging behavior can impart profound trait-mediated constraints on
community regulation that scale up to influence the structure and stability of ecosystems …

Highlights•Nut cracking efficiency differed between chimpanzee groups.•Group-specific tool
selection led to differences in nut intake rates.•Neighbouring groups applied different …

Size and shape are often considered important variables that lead to variation in
performance. In studies of feeding, size‐corrected metrics of the skull are often used as …

Although tool use may enhance resource utilization, its fitness benefits are difficult to
measure. By examining longitudinal data from 196 radio-tagged southern sea otters …

Selection and transport of materials for tools is ubiquitous throughout our species'
evolutionary history. Yet our understanding of early human material culture is heavily …

Understanding variation in social grouping patterns among animal taxa is an enduring goal
of ethologists, who seek to evaluate the selective pressures shaping the evolution of …

Human exploitation of marine mammals led to precipitous declines in many wild populations
within the last three centuries. Legal protections enacted throughout the 20th century have …

Reliable age estimation is an essential tool to assess the status of wildlife populations and
inform successful management. Aging methods, however, are often limited by too few data …

Animal stone-handling behavior (SH) has been recorded in detail only in primates, mainly
across macaque species. The purpose (s) of SH are still unknown, yet various hypotheses …