Vocalisations of the northern goshawk ...

Gestart door HPM, december 10, 2017, 12:41:10 PM

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HPM

Vocalisations of the northern goshawk and their relation to the annual breeding cycle
Alvaro Ortiz-Troncoso, December 10, 2017
https://alvarosaurus.github.io/Goshawk/article.pdf

"Goshawks are secretive birds, best detected by their vocalisations. Four common types of vocalisations were identified in literature and recordings of each of these were collected from an online source (Xeno-Canto). An examination of the relative frequency of the recordings confirms previous studies on the correspondence between vocalisation types and breeding cycle.  The lack of recordings for the winter months hints that additional effort is needed, as direct observation shows that goshawks are vocal during this period"
Herman van der Meer