English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Human language is a generative system that achieves its limitless productivity by assembling sounds into larger meaningful constructs (Chomsky, 1981; Hockett, 1960). Comparative work has demonstrated animals can also combine sounds in ways analogous to humans and this has shed important light on the prevalence of combinatorial capacities outside of humans (primates: Arnold & Zuberbühler, 2006; Ouattara, Lemasson, & Zuberbühler, 2009 / birds: Engesser et al., 2015; Engesser et al., 2016; Pepperberg, 2007; Suzuki et al., 2016 / see also: Hurford, 2007; Marler, 1977). However, further analogue examples are central in unveiling the distribution and diversity of combinatorial mechanisms in non-human communication systems, and to identify potential factors driving their emergence (Schlenker, Chemla, & Zuberbühler, 2016). Here we present evidence for a novel form of combinatorial structuring in the vocal system of a highly social passerine with a fixed vocal repertoire, the southern pied babbler (Turdoides bicolor) (Ridley & Raihani, 2007). By studying a population of wild, but habituated, babblers we demonstrate that male babblers produce two variants of long and raucous, ‘cry-like’ structures, which generally appear to function to recruit group members during group travel. Using acoustic analyses, we show that both cry variants are similar in their 101

Meaning-refining acoustic variation within the internal structure of pied babbler recruitment cries