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Bare-legged swiftlet
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<h2 id="references">References</h2> <ol> <li id="fn:1"><p>BirdLife International (2016). "Aerodramus nuditarsus". IUCN Red List of Threatened Species. 2016: e.T22728501A94988640. doi:10.2305/IUCN.UK.2016-3.RLTS.T22728501A94988640.en. Retrieved 15 November 2021. <a href="https://www.iucnredlist.org/species/22728501/94988640" target="_blank">https://www.iucnredlist.org/species/22728501/94988640</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>