Categorization of Notes Used by Female Red-Winged Blackbirds in Composite Vocalizations

Armstrong, Timothy A.

doi:10.2307/1368810

Cited by 6 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, songs of Blue-fronted Amazons are formed by combinations of different calls with specific syntax rules (Fernandez-Juricic et al 1998c). Similar composite vocalizations with the arrangement of notes varying according to the context of vocalization have been found in other species (Hailman et al 1987, Armstrong 1992), and could be important for aggregation during the nonbreeding season.…”

Section: Discussionsupporting

confidence: 69%

Guttural Calls of Blue-Fronted Amazons: Structure, Context, and Their Possible Role in Short Range Communication

Fernández‐Juricic¹,

Martella²

2000

The Wilson Bulletin

View full text Add to dashboard Cite

â€" Structural variability of guttural calls of Blue-fronted Amazons {Amazona aestiva) was examined and the contexts in which they were given discussed relative to the role these vocalizations might play in short-range communication. Recordings were obtained at the Chancaru Reserve, Cordoba, Argentina, during breeding and non-breeding seasons. Guttural calls were given year round, but were more common during the non-breeding season when most of the individuals were interacting in flocks. Gutturals were detected when perched parrots contacted each other, during take-offs, landings, complex flock flying maneuvers, and feeding sessions. Guttural calls were subdivided into four types based on structure, but none of these types could be clearly assigned to a specific context. Structural variation in guttural calls was continuous rather than discrete, with the variability within and among individuals being similar. Many guttural notes graded into one another and were combined with other vocalizations. Gutturals were brief, had sudden onset, wide bandwidth, and low intensity. Gutturals could be regarded as short-range calls because of their large structural variability (fewer restrictions of sound attenuation and degradation) and low intensity (decreased attraction of predators). They were also produced by large flocks, probably as a means of maintaining contact, enhancing group spacing, and coordinating movements of individuals.

show abstract

Section: Discussionsupporting

confidence: 69%