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Nest cavity competition may threaten an endangered Tasmanian songbird


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The Forty-spotted Pardalote (Pardalotus quadragintus), an endangered Tasmanian songbird, has been experiencing unexplained declines in its remaining habitat, and a new study in The Condor: Ornithological Applications describes how competition with a related species for nest cavities may be putting extra pressure on these vulnerable birds. Amanda Edworthy of Australian National University spent two years monitoring nests of Forty-spotted Pardalotes and Striated Pardalotes at three sites around Tasmania, documenting that about 10% of Forty-spotted Pardalote nests were ultimately taken over by their bigger, more aggressive cousins.

 

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