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

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In the American animated series Phineas and Ferb (2007–2015), the title characters own a pet bluish-green platypus named Perry who, unknown to them, is a secret agent. Such choices were inspired by media underuse, as well as to exploit the animal's striking appearance; [125] additionally, show creator Dan Povenmire, who also wrote the character's theme song, said that its opening lyrics are based on the introductory sentence of the Platypus article on Wikipedia, copying the "semiaquatic egg-laying mammal" phrase word for word, and appending the phrase "of action". [126] As a character, Perry has been well received by both fans and critics. [127] [128] Coincidentally, real platypuses show a similar cyan color when seen under ultraviolet lighting. [129] See also Hughes, R. L.; Hall, L. S. (28 July 1998). "Early development and embryology of the platypus". Philosophical Transactions of the Royal Society B: Biological Sciences. 353 (1372): 1101–14. doi: 10.1098/rstb.1998.0269. PMC 1692305. PMID 9720108.

In recent studies it has been suggested that the eyes of the platypus are more similar to those of Pacific hagfish or Northern Hemisphere lampreys than to those of most tetrapods. The eyes also contain double cones, unlike most mammals. [53] Platypus venom linked to pain relief". University of Sydney. 8 May 2008. Archived from the original on 21 August 2011 . Retrieved 14 May 2010. Platypus Paradoxes". National Library of Australia. August 2001. Archived from the original on 5 March 2012 . Retrieved 14 September 2006.It is powerful enough to kill smaller animals such as dogs, and though it is not lethal to humans, it can inflict weeks of agony. [39] [40] Edema rapidly develops around the wound and gradually spreads through the affected limb, and it may develop into an excruciating hyperalgesia (heightened sensitivity to pain) persisting for days or even months. [41] [42] Cox, Lisa (23 November 2020). "Australia's platypus habitat has shrunk 22% in 30 years, report says". the Guardian. Archived from the original on 28 November 2020 . Retrieved 28 November 2020.

Bess, Anna. "ADW: Ornithorhynchidae: INFORMATION". Animaldiversity.org. Archived from the original on 17 January 2022 . Retrieved 11 February 2022. Gardner, J. L.; Serena, M. (1995). "Spatial-Organization and Movement Patterns of Adult Male Platypus, Ornithorhynchus-Anatinus (Monotremata, Ornithorhynchidae)". Australian Journal of Zoology. 43 (1): 91–103. doi: 10.1071/ZO9950091. Platypus on brink of extinction". ScienceDaily. 12 October 2020. Archived from the original on 19 October 2020 . Retrieved 12 October 2020.a b Rauhut, O.W.M.; Martin, T.; Ortiz-Jaureguizar, E.; Puerta, P. (2002). "The first Jurassic mammal from South America". Nature. 416 (6877): 165–8. Bibcode: 2002Natur.416..165R. doi: 10.1038/416165a. hdl: 11336/99461. PMID 11894091. S2CID 4346804.