Bird songs are acoustic communication signals primarily used in male-male aggression and in male-female attraction. These are often monotonous patterns composed of a few phrases, yet some birds have extremely complex songs with a large phrase repertoire, organized in non-random fashion with discernible patterns. Since structure is typically associated with function, the structures of complex bird songs provide important clues to the evolution of animal communication systems. Here we propose an efficient network-based approach to explore structural design principles of complex bird songs, in which the song networks–transition relationships among different phrases and the related structural measures–are employed.
Sasahara K, Cody ML, Cohen D, Taylor CE (2012) Structural Design Principles of Complex Bird Songs: A Network-Based Approach. PLoS ONE 7(9): e44436. http://dx.doi.org/10.1371/journal.pone.0044436
Via Complexity Digest