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Of the five mammals native to Christmas Island, only one is left – the Christmas Island flying fox. The other four have gone extinct, along with several reptile species. And the weird thing is, the birds of Christmas Island are the cause… or, at least, their poop is.
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Sources:
https://archive.org/details/amonographchris00andrgoog/page/n41/mode/2up
https://conbio.onlinelibrary.wiley.com/doi/10.1111/csp2.358
https://www.theguardian.com/environment/2025/sep/15/scientists-fear-this-cute-and-chonky-flying-fox-could-be-one-cyclone-away-from-extinction
https://www.theguardian.com/environment/2022/may/18/christmas-island-forest-skinks-lizard-extinct-aoe
https://christmasislandnationalpark.gov.au/discover/history/
https://blog.geolsoc.org.uk/2013/12/18/door-18-history-and-geology-of-christmas-island/
https://www.dcceew.gov.au/parks-heritage/national-parks/christmas-island-national-park/publications/final-report-christmas-island-expert-working-group
https://www.dcceew.gov.au/environment/biodiversity/threatened/strategy/priority-places/christmas-island
http://st1.asflib.net/MEDIA/ASF-CD/ASF-M-00247/HRK/6CI/CIPoster.pdf
https://news.uq.edu.au/2020-03-22-christmas-island-discovery-redraws-map-life
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https://www.dcceew.gov.au/sites/default/files/documents/81746.pdf
https://www.christmas.net.au/nature-wildlife
https://www.intechopen.com/chapters/62618
https://www.britannica.com/place/Christmas-Island
https://prlgroup.com.au/about-us/our-history/
https://doi.org/10.71747/uow-r3gk326m.28139222
https://www.christmas.net.au/christmas-island-history
https://prlgroup.com.au/our-business/resources-energy/cirp-christmas-island-phosphates/
https://www.sbs.com.au/news/article/clock-is-ticking-the-australian-island-facing-an-uncertain-future/0ob1ta2k1
https://connectsci.au/az/article/37/1/1/267061/Mammal-extinction-by-introduced-infectious-disease
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0003602
https://d1wqtxts1xzle7.cloudfront.net/83098682/am00043-libre.pdf?1648936043=&response-content-disposition=inline%3B+filename%3DThe_decline_and_current_status_of_the_Ch.pdf&Expires=1776203363&Signature=AZClvi~teGJe-N0eH9yb9Vat-cyZ8IH4ZUv4lVyv8aJU3uapZ9DdIuJSWKIiR60BMx7eQTmOE64N6PRtY0uzMxRhJzNST-~zbnH-920WpxPHTCUIbdZsVNqxoegGxFRk2xSmg5zSH~Nbi4K~IRPx0npFGztdryWTJyEzK-UuqnPHZnoGyWnBzu~3Ot8Q7cSgW9mCWr9qPGwRZjBu7RMOPMRYBfZiQ2yaSZ5bE5Wgycoyb~U4pz0nOJWww12nJaVJJqKVKvlL5qcnpDCqXtKJA0jpzbML5kGf0y~WAkuXjiWnI7KYu0c65ALEcvwZR8ES728rWGSDHgR~jZhE6qU~Jw__&Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA
https://theconversation.com/and-then-there-were-none-australias-only-shrew-declared-extinct-265988
https://news.mongabay.com/short-article/2025/10/christmas-island-shrew-officially-declared-extinct-iucn/
https://invasives.org.au/our-work/ending-extinctions/extinct-christmas-island-pipistrelle/
https://www.iucnredlist.org/species/136769/209549918
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https://christmasislandnationalpark.gov.au/discover/nature/animals/ci-flying-fox
https://www.dcceew.gov.au/sites/default/files/env/pages/2cd790fe-e19b-4c90-8589-d5f7026b5477/files/64801-conservation-advice.pdf
https://christmasislandnationalpark.gov.au/discover/nature/
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Images:
https://docs.google.com/document/d/1ChMzqtHdWYE0uWv4If5MUdrYpFNbHia5JrMgF6DHcpY/edit?tab=t.0
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