Social complexity has been one of the recent emerging topics in the study of animal and
human societies, but the concept remains both poorly defined and understood. In this paper …

The 'social complexity hypothesis' for communication posits that groups with complex social
systems require more complex communicative systems to regulate interactions and relations …

Adult rats emit two categories of ultrasonic vocalizations, 22kHz calls and 50kHz calls.
These vocalizations communicate animal's emotional state to other members of the social …

Human language can express limitless meanings from a finite set of words based on
combinatorial rules (ie, compositional syntax). Although animal vocalizations may be …

Animal acoustic communication often takes the form of complex sequences, made up of
multiple distinct acoustic units. Apart from the well‐known example of birdsong, other …

The popularity of bioacoustics for threatened species monitoring has surged. Large volumes
of acoustic data can be collected autonomously and remotely with minimal human effort. The …

Complex vocal learning, a critical component of human spoken language, has been
assumed to be associated with more-advanced cognitive abilities. Tests of this hypothesis …

Variation in communicative complexity has been conceptually and empirically attributed to
social complexity, with animals living in more complex social environments exhibiting more …

Many animals use variation in their alarm calls to warn conspecifics about different predatory
threats. Information about predators can be encoded by producing discrete types of alarm …

Social factors play a key role in the structuring of vocal repertoires at the individual level,
notably in non-human primates. Some authors suggested that, at the species level too …