Journal
BEHAVIOURAL PROCESSES
Volume 157, Issue -, Pages 68-72Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.beproc.2018.08.010
Keywords
Communication; Java sparrow; Trill; Vocalization
Categories
Funding
- MEXT/JSPS KAKENHI [4903, JP17H06380]
- University of Tokyo
- [17J09485]
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Bird vocalizations are often differentiated using terms such as song and call. The Java sparrow (Lonchura oryzivora) uses several calls in different behavioral situations; notably, they produce similar calls in disparate situations of aggressiveness or affinity. These calls are composed of short syllables with narrow intervals repeated in quick succession. We distinguished these trill-calls as either aggressive or affiliative trills based on behavioral context. We compared the sound pressure levels, frequency of maximum amplitude, entropy, and repetition rate of the two types of trills. Sound pressure level and entropy were higher and trill rate was faster in aggressive trills than in affiliative trills. As these two similarly composed but distinct trill-calls are used in disparate interactive contexts, they could serve as a model system to study the relationship between communicative behavior and brain activity.
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