Highlights•Vocal functional flexibility is fundamental to language but is overlooked.•This
ability is largely misunderstood in animal communication research.•We clarify what vocal …

Aims To study the probability of seeking/undergoing aesthetic dental treatment (ADT) and
compare self-perception of orofacial appearance (OA) based on sex, age, and monthly …

Animal affective computing is a quickly growing field of research, where only recently first
efforts to go beyond animal tracking into recognizing their internal states, such as pain and …

Although studies on primate communication have mainly focused on single communication
systems (gestural, facial or vocal), there is an increasing interest in a more integrative …

Parsing signals from noise is a general problem for signallers and recipients, and for
researchers studying communicative systems. Substantial efforts have been invested in …

The social complexity hypothesis for communicative complexity posits that animal societies
with more complex social systems require more complex communication systems. We tested …

Identifying novel medicinal resources in chimpanzee diets has historically presented
challenges, requiring extensive behavioral data collection and health monitoring …

Social play is ubiquitous in the development of many animal species and involves players
adapting actions flexibly to their own previous actions and partner responses. Play differs …

The increasing interest in the study of spontaneous (SY) and contagious yawning (CY) was
so far focused on several taxa, especially primates. Here, we focused on SY and CY in …

Facial expressions in nonhuman primates are complex processes involving psychological,
emotional, and physiological factors, and may use subtle signals to communicate significant …