Editing Sex (section)

=== Sex differences in behavior ===
{{See also|Sex differences in psychology|Animal sexual behaviour|Non-reproductive sexual behavior in animals|Sex differences in cognition}}

The sexes across gonochoric species usually differ in behavior. In most animal species, females invest more in parental care,<ref>{{cite book| vauthors = Kliman R |url={{GBurl|id=_r4OCAAAQBAJ|pg=RA1}} | veditors = Herridge EJ, Murray RL, Gwynne DT, Bussiere L |title=Encyclopedia of Evolutionary Biology|year=2016|publisher=Academic Press|isbn=978-0-12-800426-5|volume=2|pages=453–454|language=en }}</ref> although in some species, such as some [[coucal]]s, the males invest more [[parental care]].<ref>{{cite journal | vauthors = Henshaw JM, Fromhage L, Jones AG | title = Sex roles and the evolution of parental care specialization | journal = Proceedings. Biological Sciences | volume = 286 | issue = 1909 | pages = 20191312 | date = August 2019 | pmid = 31455191 | pmc = 6732396 | doi = 10.1098/rspb.2019.1312 }}</ref> Females also tend to be more choosy for who they mate with,<ref>{{cite journal | vauthors = Brennan P | date = 2010 | title = Sexual Selection {{!}} Learn Science at Scitable | journal = Nature Education Knowledge | volume = 3 | issue = 10 | page = 79 |url= https://www.nature.com/scitable/knowledge/library/sexual-selection-13255240/|access-date=25 July 2021 |archive-date=9 October 2021|archive-url= https://web.archive.org/web/20211009163133/https://www.nature.com/scitable/knowledge/library/sexual-selection-13255240/|url-status=live}}</ref> such as most bird species.<ref>{{cite book| vauthors = Macedo RH, Manica LT | chapter = Sexual Selection and Mating Systems: Contributions from a Neotropical Passerine Model | veditors = Reboreda JC, Fiorini VD, Tuero DT |url={{GBurl|id=ItmUDwAAQBAJ|q=behavioral+ecology+choosy+female|p=75}}|title=Behavioral Ecology of Neotropical Birds |date=2019|publisher=Springer|isbn=978-3-030-14280-3|pages=75|language=en}}</ref> Males tend to be more competitive for mating than females.<ref name="Lehtonen-2016">{{cite journal | vauthors = Lehtonen J, Kokko H, Parker GA | title = What do isogamous organisms teach us about sex and the two sexes? | journal = Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences | volume = 371 | issue = 1706 | date = October 2016 | pmid = 27619696 | pmc = 5031617 | doi = 10.1098/rstb.2015.0532 | author-link2 = Hanna Kokko | author-link3 = Geoff Parker }}</ref>