A superb solo, or a deviant duet? Overlapping songs in superb fairy-wrens

Date

2019-04-16

Authors

Taylor, Claire
Hall, Michelle
Cain, Kristal
Langmore, Naomi

Journal Title

Journal ISSN

Volume Title

Publisher

Oxford University Press

Abstract

Avian duets are formed when 2 birds coordinate their songs. Most research on the evolution and function of duetting has focused on species with highly coordinated duets, and less is known about the context and function of overlapping songs that are more loosely coordinated, in part due to the challenge of determining whether such vocalizations coincide by chance or through coordination between the partners. Here, we use field recordings and playback experiments to test whether breeding pairs of superb fairy-wrens, Malurus cyaneus, coordinate their territorial songs to form duets. We test 3 key characteristics of duetting; whether partners’ songs 1) overlap more than expected by chance; 2) have a stereotyped structure that occurs repeatedly and predictably in time, and 3) show evidence of a constant time lag between the contributions of the 2 participants, indicating that individuals are coordinating their songs. This is the first study to quantify the temporal precision of song between partners to investigate coordination in the Malurus genus, an important model taxon for song, sexual selection, and speciation. We found variation in the extent to which partners’ songs overlapped, with some individuals overlapping their partners’ songs more than expected by chance, no difference in structure of solo and overlapping songs, and no evidence of a consistent response interval. Thus song overlap in superb fairy-wrens meets only some criteria for duetting. We suggest that overlapping songs in this species may be due to individuals responding independently of the same stimulus and/or “call and answer” between pair members.

Description

Keywords

avian duetting, female song, superb fairy-wren, temporal coordination

Citation

Source

Behavioral Ecology

Type

Journal article

Book Title

Entity type

Access Statement

Open Access

License Rights

DOI

10.1093/beheco/arz052

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