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«Oslo gay animal show draws crowds». BBC. 19 October 2006. Henta 15. juni 2009.
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«Sexual preference chemical found in mice». BBC News. 23. mars 2011. Henta 24. mars 2011.

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«Full text | Male-like sexual behavior of female mouse lacking fucose mutarotase». BioMed Central. 7. juli 2010. Henta 17. november 2010.

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Lionel Tiger (1992). The Pursuit of Pleasure. Transaction Publishers. s. 66ff. ISBN 0-7658-0696-7.

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«Gay penguin couple adopts abandoned egg in German zoo». CBC News. 5. juni 2009.
«Same-sex penguin pair pursue female partners». CBC News. 12. desember 2011.

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Bonobos at the Columbus Zoo, arkivert frå originalen 2. juni 2002, henta 28. november 2014

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«Courtney Laird, "Social Organization"». Bio.davidson.edu. Henta 17. november 2010.

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Selim, Jocelyn (28. april 2006). «Top Dogs: Steroid hormones give hyenas a head start.». Discover Magazine. Henta 11. september 2007.

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«Cold Shoulder for Swedish Seductresses | Germany | Deutsche Welle | 10.02.2005». Dw-world.de. Henta 17. november 2010.

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Harrold, Max (16. februar 1999). «Biological Exuberance: Animal Homosexuality and Natural Diversity». The Advocate, reprinted in Highbeam Encyclopedia. Henta 10. september 2007.

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Roselli, Charles E.; Kay Larkin; John A. Resko; John N. Stellflug; Fred Stormshak (2004). «The Volume of a Sexually Dimorphic Nucleus in the Ovine Medial Preoptic Area/Anterior Hypothalamus Varies with Sexual Partner Preference». Endocrinology (Endocrinology, Department of Physiology and Pharmacology, Oregon Health & Science University (C.E.R., K.L., J.A.R.), Portland, Oregon; Department of Animal Sciences, Oregon State University (F.S.), Corvallis, Oregon; and Agricultural Research Service, United States Sheep Experiment Station (J.N.S.), Dubois, Idaho.) 145 (2 478–483): 478–83. Arkivert frå originalen 25. september 2007. Henta 10. september 2007.

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Schuster, Ruth (December 19, 2013). «Lesbian Penguins Shack Up at Israeli Zoo». The Jewish Daily Forward.

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Gailey, D. A.; Hall (J.C.). «Behavior and Cytogenetics of fruitless in Drosophila melanogaster: Different Courtship Defects Caused by Separate, Closely Linked Lesions». Genetics (The Genetics Society of America) 121 (4): 773–785. Henta 14. desember 2008.

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Animal Homosexuality: A Biosocial Perspective By Aldo Poiani, A. F. Dixson, Aldo Poiani, A. F. Dixson, s. 179, 2010, Cambridge University Press

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Jonathan Lis (21 September 2009). «'Gay' vulture couple split up at Jerusalem zoo, then become fathers». Haaretz. Arkivert frå originalen 16. juni 2013. Henta 21. september 2009.

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Moeliker, C.W. (9 November 2001). «The First Case of Homosexual Necrophilia in the Mallard Anas platyrhynchos (Aves: Anatidae)» (PDF). Deinsea 8 (2001): 243–247. Henta 6 October 2014.

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McCormack, Simon (14 November 2011), «Gay Penguins Reunion: Buddy And Pedro Will Be Back Together By Spring», Gay Voices (Huffington Post), henta 16 November 2011

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Eric Silver (2 August 1999). «Gay vulture couple raise surrogate chicks». London: The Independent News. Henta 21. september 2009.

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Scrivener, C.J (2008): Behavioural problems, Merck Manual of Veterinary Medicine.

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«Like mother, like cubs: Hyena alpha moms jumpstart cubs with hormonal jolt». Michigan State University. 2006. Arkivert frå originalen 29. juni 2007. Henta 11. september 2007.
Holekamp, Kay E. (2003). «Research: Spotted Hyena - Introduction and Overview». Michigan State University, Department of Zoology. Arkivert frå originalen 29. juni 2007. Henta 11. september 2007.

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«Molecular regulation of sexual preference revealed by genetic studies of 5-HT in the brains of male mice». Nature. 23. mars 2011. Henta 24. mars 2011.

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Gordon, Dr Dennis (10 April 2007). «‘Catalogue of Life’ reaches one million species». National Institute of Water and Atmospheric Research. Henta 10. september 2007.

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Smith, Dinitia (February 7, 2004). «Love That Dare Not Squeak Its Name». New York Times. Henta 10. september 2007.

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«Same-sex behavior seen in nearly all animals». Physorg.com. 16. juni 2009. Henta 17. november 2010.

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«The behavior of a close relative challenges assumptions about male supremacy in human evolution». Primates.com. Henta 17. november 2010.

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Calvin Reid Gay Lib for the Animals: A New Look At Homosexuality in Nature. Volume 245 Issue 5 02/01/1999, Feb 01, 1999

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Terry, J. (April 200). «'Unnatural Acts' in Nature: The Scientific Fascination With». GLQ: A Journal of Lesbian and Gay Studies 6 (2): 151, 43.

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"Same-sex Behavior Seen In Nearly All Animals, Review Finds", Science Daily
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Smith, Dinitia (February 7, 2004). «Central Park Zoo's gay penguins ignite debate». San Francisco Chronicle, reprinted from New York Times. Henta 10. september 2007.
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May, Meredith (14. juli 2009). «Widow a wedge between zoo's male penguin pair». Sfgate.com. Henta 17. november 2010.

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Frans B. M. de Waa (March 1995). «Bonobo Sex and Society». Scientific American. s. 82–88. Henta 17. juli 2006.

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«Gay vultures split up to go straight | Showbiz: Latest News | STV Entertainment». Entertainment.stv.tv. Henta 17. november 2010.

telegraph.co.uk

Moore, Matthew (8. juli 2010). «Female mice 'can be turned lesbian by deleting gene'». London: Telegraph.co.uk. Henta 17. november 2010.

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Srivastav, Suvira (15–31 December 2001). «Lion, Without Lioness». TerraGreen: News to Save the Earth. Terragreen. Henta 2. september 2007.

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«They're in love. They're gay. They're penguins... And they're not alone.». Columbia University, Columbia News Service. June 10, 2002.

uchicago.edu

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«Wilson, Sexing the Hyena - "The males mount each other"». University of Chicago Press. Henta 11. september 2007.

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Jonathan Lis (21 September 2009). «'Gay' vulture couple split up at Jerusalem zoo, then become fathers». Haaretz. Arkivert frå originalen 16. juni 2013. Henta 21. september 2009.
Bagemihl, Bruce (May 2000). «Left-Handed Bears & Androgynous Cassowaries: Homosexual/transgendered animals and indigenous knowledge». Whole Earth Magazine (archived by archive.org). Arkivert frå originalen 15. august 2000. Henta 13 December 2013.
Bonobos at the Columbus Zoo, arkivert frå originalen 2. juni 2002, henta 28. november 2014
Roselli, Charles E.; Kay Larkin; John A. Resko; John N. Stellflug; Fred Stormshak (2004). «The Volume of a Sexually Dimorphic Nucleus in the Ovine Medial Preoptic Area/Anterior Hypothalamus Varies with Sexual Partner Preference». Endocrinology (Endocrinology, Department of Physiology and Pharmacology, Oregon Health & Science University (C.E.R., K.L., J.A.R.), Portland, Oregon; Department of Animal Sciences, Oregon State University (F.S.), Corvallis, Oregon; and Agricultural Research Service, United States Sheep Experiment Station (J.N.S.), Dubois, Idaho.) 145 (2 478–483): 478–83. Arkivert frå originalen 25. september 2007. Henta 10. september 2007.
«Like mother, like cubs: Hyena alpha moms jumpstart cubs with hormonal jolt». Michigan State University. 2006. Arkivert frå originalen 29. juni 2007. Henta 11. september 2007.
Holekamp, Kay E. (2003). «Research: Spotted Hyena - Introduction and Overview». Michigan State University, Department of Zoology. Arkivert frå originalen 29. juni 2007. Henta 11. september 2007.

wholeearthmag.com

Bagemihl, Bruce (May 2000). «Left-Handed Bears & Androgynous Cassowaries: Homosexual/transgendered animals and indigenous knowledge». Whole Earth Magazine (archived by archive.org). Arkivert frå originalen 15. august 2000. Henta 13 December 2013.

wikigenes.org

Fucose mutarotase ved wikigenes.org

wikipedia.org

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«BBC News - Gay Penguins in Kent zoo are the best parents». BBC. 14. mai 2014. Henta 7. september 2014.

wiley.com

doi.wiley.com

Forger, Nancy G.; Laurence G. Frank; S. Marc Breedlove; Stephen E. Glickman (6 December 1998). «Sexual Dimorphism of Perineal Muscles and Motoneurons in Spotted Hyenas». The Journal of Comparative Neurology 375 (2): 333–43. Henta 11. september 2007.

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Cole, Charles J.; Townsend, Carol R. (9 May 2005). «Parthenogenetic lizards as vertebrate systems». Journal of Experimental Zoology (Wiley Interscience) 256 (S4): 174–176. Henta 14. desember 2008. ^{[daud lenkje]}

zmescience.com

«Insect homosexuality just a case of mistaken identity». Oct 21, 2013.