Hi, a neighbour of mine has filmed this at her home in Wamboin, and has taken some still photos as well. The video is at
https://www.dropbox.com/s/glns3l6awp7ujdq/Crimson%20parent%20%26%20Eastern%20juvenile%20%281%29.MOV?dl=0
She has drawn attention to an article on brood-parasitism in rosellas that has recently been published:
Martens, JM, Stokes, HS, Berg, ML & Bennett, AT 2018, 'A mixed-species brood of wild Australian parrots (Eastern Rosella
Platycercus eximius and Crimson Rosella P. elegans)—accident or brood-parasitism?',
Australian Field Ornithology, vol. 35, pp. 87-90.
Abstract: We report a novel case of a mixed-species brood in wild Australian parrots. Two Eastern Rosellas
Platycercus eximius and one Crimson Rosella P. elegans were raised by a pair of Eastern Rosellas in the same nest-box in southern Victoria, Australia, in late 2016.
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'We conclude that the shared nest is most likely evidence of brood-parasitism, as we observed only the Eastern Rosellas rearing the nestlings, with no observed parental care by the Crimson Rosellas. We suggest that this occurred either by accident, or as a
result of failed intraspecific brood-parasitism, as this form of brood-parasitism is known to occur on rare occasions in Crimson Rosellas, and interspecific brood-parasitism has not, to our knowledge, been reported before in Crimson and Eastern Rosellas. Our
observation does, however, provide only limited data, which precludes a definite explanation. Our observations raise the possibility that interspecific brood-parasitism can occasionally occur in parrots, and that it may be more widespread across avian taxa
than previously thought. As nest-hollow availability is likely to decrease in the future as habitats are further modified by humans (Grarock et al. 2013), cases of multiple species attempting to use the same nest may occur more often (Barrientos et al. 2015).
Possible adverse impacts from such occurrences could include reduced breeding success or enhanced disease transmission, which could be of particular importance for endangered species' (p. 89).
Has anyone any insights to share about what we can see in the video?
Regards - David
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David McDonald
1004 Norton Road
Wamboin NSW 2620
Australia
E:
M: 0416 231 890 (national)
M: +61 416 231 890 (international)
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