Oi Duck-billed Platypus! (Oi Frog and Friends)

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a b Pascual, R.; Goin, F.J.; Balarino, L.; Udrizar Sauthier, D.E. (2002). "New data on the Paleocene monotreme Monotrematum sudamericanum, and the convergent evolution of triangulate molars" (PDF). Acta Palaeontologica Polonica. 47 (3): 487–492. Archived (PDF) from the original on 9 August 2017 . Retrieved 18 March 2009. Australian Animals Monotremes – Issue Date 26 September 2016". Australia Post Collectables. Archived from the original on 26 January 2021 . Retrieved 12 September 2020. The platypus is not considered to be in immediate danger of extinction, because conservation measures have been successful, but it could be adversely affected by habitat disruption caused by dams, irrigation, pollution, netting, and trapping. Reduction of watercourse flows and water levels through excessive droughts and extraction of water for industrial, agricultural, and domestic supplies are also considered a threat. The IUCN lists the platypus on its Red List as " Near Threatened" [1] as assessed in 2016, when it was estimated that numbers had reduced by about 30 percent on average since European settlement. The animal is listed as endangered in South Australia, but it is not covered at all under the federal EPBC Act. [100] [101] Pitter patter – Platypus twins!". Zoo Victoria. 4 March 2013. Archived from the original on 28 August 2018 . Retrieved 17 August 2017.

Monotrematum sudamericanum, another fossil relative of the platypus, has been found in Argentina, indicating monotremes were present in the supercontinent of Gondwana when the continents of South America and Australia were joined via Antarctica (until about 167 million years ago). [88] [89] A fossilised tooth of a giant platypus species, Obdurodon tharalkooschild, was dated 5–15 million years ago. Judging by the tooth, the animal measured 1.3 metres long, making it the largest platypus on record. [90] Platypus skeletonAustralian Fauna". Australian Fauna. Archived from the original on 29 May 2012 . Retrieved 14 May 2010.

Platypus Paradoxes". National Library of Australia. August 2001. Archived from the original on 5 March 2012 . Retrieved 14 September 2006. Circulating coins: Twenty Cents". Royal Australian Mint. 8 January 2016. Archived from the original on 19 March 2021 . Retrieved 12 September 2020.

Books Multibuys

Proske, Uwe; Gregory, J. E.; Iggo, A. (1998). "Sensory receptors in monotremes". Philosophical Transactions of the Royal Society of London. 353 (1372): 1187–1198. doi: 10.1098/rstb.1998.0275. PMC 1692308. PMID 9720114. a b c d e f g h i j k l m n o Grant, J.R. "16" (PDF). Fauna of Australia. Vol.1b. Australian Biological Resources Study (ABRS). Archived from the original (PDF) on 19 May 2005 . Retrieved 13 September 2006. a b Philip Bethge (April 2002). Energetics and foraging behaviour of the platypus (thesis). University of Tasmania. doi: 10.25959/23210588.v1. Archived from the original on 25 October 2018 . Retrieved 21 June 2009.