31:
197:
75:
50:
295:
276:
721:
358:
Little is known about the lake duck's diet, but it is believed to consist of small invertebrates, seeds, and plant remains. The breeding season varies between countries, occurring from
October to January in Argentina. Males produce popping noises and "mechanical rustling noises" for display.
326:
in relation to body length. The penis, which is typically coiled up in flaccid state, can reach about the same length as the animal itself when fully erect, but more commonly is about half the bird's length. It has a soft tip and spiny base. It is theorized that the size of their
371:
species. It lives in bodies of freshwater with large amounts of vegetation, such as wetlands and lakes. It is very widespread, naturally occurring in
Argentina, Brazil, Chile, Paraguay, and Uruguay, and having been
283:
The lake duck grows to 36–46 centimetres (14–18 in). Females weigh 510–700 grams (18–25 oz) and males 600–850 grams (21–30 oz). Males can be distinguished from
911:
331:
with bristled tips may have evolved in response to competitive pressure in these highly promiscuous birds, removing sperm from previous matings in the manner of a
1112:
963:
1082:
342:, ducks have a long corkscrew penis, and the females have a long corkscrew vagina, which spirals in the opposite direction. The males often try to force
885:
469:
924:
519:
1002:
663:
Brennan, Patricia L. R.; Prum, Richard O.; McCracken, Kevin G.; Sorenson, Michael D.; Wilson, Robert E.; Birkhead, Tim R. (2 May 2007).
1107:
1041:
929:
950:
498:
1097:
823:
647:
968:
976:
74:
30:
380:. It has a stable population of 6,700–67,000, with no major threats. As of 2016, it is listed as a species of
1102:
625:
224:
186:
981:
810:
737:
503:
828:
1028:
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169:
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815:
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McCracken, Kevin G.; Wilson, Robert E.; McCracken, Pamela J.; Johnson, Kevin P. (2001).
409:
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346:, but the complex mating geometry allows the females to retain control—most
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that had a penis measuring 42.5 centimetres (16.7 in). It also has the
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Female ducks have an anti-corkscrew vagina made for difficult penetration.
994:
754:
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136:
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for having the largest avian reproductive organ, from a specimen in
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291:), a similar species, by being smaller and having a flatter head.
274:
1007:
877:
665:"Coevolution of Male and Female Genital Morphology in Waterfowl"
116:
735:
403:
401:
575:"Sexual selection: Are ducks impressed by drakes' display?"
744:
645:
Duck genitals locked in arms race | COSMOS magazine
520:"The 20-cm Spiny Penis of the Argentine Lake Duck (
433:10.2305/IUCN.UK.2016-3.RLTS.T22679824A92830830.en
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491:
8:
350:do not result in successful fertilization.
732:
195:
48:
29:
20:
692:
682:
592:
431:
470:Handbook of the Birds of the World Alive
499:"Largest reproductive organ for a bird"
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1113:Taxa named by Rodolfo Amando Philippi
458:
456:
454:
452:
450:
7:
626:"Found! The longest bird penis ever"
1083:IUCN Red List least concern species
419:IUCN Red List of Threatened Species
624:Saleh, Anna (September 14, 2001).
14:
719:
73:
408:BirdLife International (2016).
463:Carboneras, C.; Kirwan, G. M.
1:
367:The lake duck is a partially
340:most male birds have no penis
684:10.1371/journal.pone.0000418
518:McCracken, Kevin G. (2000).
465:"Lake Duck (Oxyura vittata)"
1129:
257:Argentine blue-billed duck
218:
211:
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175:
168:
70:Scientific classification
68:
46:
37:
28:
23:
426:: e.T22679824A92830830.
307:The lake duck holds the
251:. It is also called the
1108:Birds described in 1860
504:Guinness World Records
299:
280:
1029:Paleobiology Database
309:Guinness World Record
297:
278:
728:at Wikimedia Commons
265:Argentine ruddy duck
261:Argentine lake duck
253:Argentine blue-bill
40:Conservation status
1098:Birds of Argentina
650:2008-07-25 at the
348:forced copulations
313:Córdoba, Argentina
300:
281:
221:Erismatura vittata
1070:
1069:
1016:Open Tree of Life
738:Taxon identifiers
724:Media related to
289:Oxyura ferruginea
249:stiff-tailed duck
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16:Species of bird
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746:Oxyura vittata
742:
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730:
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726:Oxyura vittata
715:
714:External links
712:
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655:
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562:on 2008-07-05.
539:(3): 820–825.
522:Oxyura vittata
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412:Oxyura vittata
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246:South American
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382:least concern
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478:. Retrieved
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437:. Retrieved
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363:Distribution
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333:bottle brush
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127:Anseriformes
18:
977:Neotropical
899:iNaturalist
770:Wikispecies
631:ABC Science
439:12 November
285:Andean duck
271:Description
1077:Categories
1055:Xeno-canto
677:(5): 418.
392:References
374:introduced
344:copulation
324:vertebrate
24:Lake duck
1088:Oxyurinae
369:migratory
338:Although
236:lake duck
155:Species:
93:Kingdom:
87:Eukaryota
943:22679824
917:10193188
816:22679824
811:BirdLife
755:Wikidata
703:17476339
670:PLOS One
648:Archived
603:11557968
480:27 April
376:to the
354:Behavior
227:, 1860)
225:Philippi
213:Synonyms
187:Philippi
137:Anatidae
133:Family:
107:Chordata
103:Phylum:
97:Animalia
83:Domain:
60:IUCN 3.1
982:lakduc1
891:5232469
878:1048503
865:lakduc1
839:lakduc1
798:Avibase
761:Q646048
694:1855079
611:4321156
553:4089612
532:The Auk
384:on the
322:of any
317:longest
279:Females
189:, 1860)
143:Genus:
123:Order:
113:Class:
58: (
1047:225950
1034:401334
1008:225950
930:175181
829:112887
701:
691:
609:
601:
580:Nature
551:
207:range
148:Oxyura
1093:Ducks
1042:WoRMS
1021:88380
995:70461
912:IRMNG
860:eBird
852:4BMPL
836:BOW:
607:S2CID
560:(PDF)
549:JSTOR
527:(PDF)
320:penis
303:Penis
263:, or
1003:OBIS
969:8885
964:NCBI
938:IUCN
925:ITIS
904:7077
886:GBIF
824:BOLD
699:PMID
599:PMID
482:2019
441:2021
424:2016
234:The
117:Aves
951:NBN
873:EoL
847:CoL
785:ADW
689:PMC
679:doi
589:doi
585:413
541:doi
537:117
428:doi
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524:)"
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681::
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410:"
287:(
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62:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
