First field observation of Karimui Owlet-Nightjar <i>Aegotheles bennettii terborghi</i>

Lagerqvist, Markus; Banwell, Ashley; McNeill, Roger

doi:10.25226/bboc.v137i2.2017.a7

Cited by 3 publications

(1 citation statement)

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“…Nocturnal calls recorded on Goodenough Island, in the D'Entrecasteaux Archipelago (race plumifer), which have been ascribed to this species, comprised a hoarse, mournful U whoa whoa, with a slight pause between the first and second notes (Holyoak, 2001). A recording, believed to pertain to race terborghi, was made on the same day and very close to where an individual of this subspecies was photographed in July 2016, from which a sonogram has been published (Lagerqvist et al, 2017), but to date the recording itself has apparently not been deposited in a publicly accessible database Kirwan, del Hoyo, Holyoak, and Collar (2020) gape threat display but no hissing. Roper (2012) call Powys (2010) recorded is different to the threat display hiss I observed and likely different from that of at least North (1901North ( -1914 and Bryant (1934).…”

Section: Vogelkop Owlet-nightjar Aegotheles Affinismentioning

confidence: 99%

Hissing as part of threat display in the Australian Owlet‐nightjar Aegotheles cristatus

Fitzsimons

2024

Ecology and Evolution

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Vocalisations of owlet‐nightjars Aegotheles sp. are poorly known, with the exception of the Australian Owlet‐nightjar A. cristatus. Among the vocalisations for the Australian Owlet‐nightjar, hissing has been described as part of threat display in three first‐hand early published reports (between 1848 and 1934). However, no reports of this behaviour have been published since 1934, despite a number of field studies on the breeding biology of the species, potentially casting doubt on the veracity of earlier reports. Here I describe an instance of hissing as part of a threat display (which also included flattening its body, with head up, swaying side to side and gape wide open) of an Australian Owlet‐nightjar cornered in a nest box. I compare my observations to the few published occurrences, pose questions as to the circumstances and conditions for this behaviour, review vocalisations of other owlet‐nightjar species and instances of hissing in Caprimulgiformes.

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