Native and exotic nest predators of Alwal (Golden-shouldered parrot Psephotellus chrysopterygius) on Olkola Country, Cape York Peninsula, Australia
2020; Taylor & Francis; Volume: 120; Issue: 2 Linguagem: Inglês
10.1080/01584197.2020.1750963
ISSN1448-5540
AutoresTeghan D. Collingwood, James E. M. Watson, Stephen Kearney, Allana Brown, Ashaley Ross, Glen Kulka, Hamish Kulka, Karla Kulka, Francis Royee, Brendan Ross, Terry Mahney, Katy Huett, Alex S. Kutt,
Tópico(s)Identification and Quantification in Food
ResumoNest predation is considered a major cause of population decline for the Endangered Alwal Psephotellus chrysopterygius (Golden-shouldered parrot) in Cape York Peninsula, Australia. Camera-traps were installed at 28 Alwal nests across two breeding seasons in four important refuges for the parrot, to confirm nest predator identities and their impact on nesting success. Nest predators were more common at Alwal nests prior to fledging. The feral cat Felis catus and yellow-spotted monitor Varanus panoptes were the most common predators detected at nests, but the Black-backed butcherbird Cracticus mentalis, Pied butcherbird C. nigrogularis and Brown goshawk Acciptier fasciatus were also documented predating nests. Predators were significantly more common at nests in the days prior to fledging, possibly due to increased nest site activity. Nest success was higher amongst denser vegetation, indicating that cover may inhibit detection of nests by predators, particularly at fledging time. As with many threatened species globally, further monitoring is needed to disentangle knowledge of Alwal nest predation, including refined nest-monitoring techniques to document elusive predation events.
Referência(s)