Utente:BlackPanther2013/Sandbox/kakapo: differenze tra le versioni

Versione delle 00:47, 28 set 2018

Versione attuale delle 08:53, 9 ago 2021

Riga 212:

[[File:Mob of Red Kangaroos (Macropus rufus).jpg|left|thumb|Mob of red kangaroos at the Wagga Wagga Botanic Gardens]]

Red kangaroos live in groups of 2–4 members. The most common groups are females and their young.<ref name="Tyndale 2005"/> Larger groups can be found in densely populated areas and females are usually with a male.<ref>{{cite journal|author=Johnson, C. N. |year=1983|title=Variations in Group Size and Composition in Red and Western Grey Kangaroos, ''Macropus rufus'' (Desmarest) and ''M. fulignosus'' (Desmarest)|journal=Australian Wildlife Research|volume=10|pages= 25–31|doi=10.1071/WR9830025 }}</ref> Membership of these groups is very flexible, and males (boomers) are not territorial, fighting only over females (flyers) that come into heat. Males develop proportionately much larger shoulders and arms than females.<ref>{{cite journal|author= Jarman, P. |year= 1983|title=Mating system and sexual dimorphism in large, terrestrial, mammalian herbivores|journal=Biological Reviews|volume=58|pages=485–520|doi=10.1111/j.1469-185X.1983.tb00398.x|issue= 4}}</ref> Most agonistic interactions occur between young males, which engage in ritualised fighting known as ''boxing''. They usually stand up on their hind limbs and attempt to push their opponent off balance by jabbing him or locking forearms. If the fight escalates, they will begin to kick each other. Using their tail to support their weight, they deliver kicks with their powerful hind legs. Compared to other kangaroo species, fights between red kangaroo males tend to involve more wrestling.<ref name = "McCullough 2000"/> Fights establish dominance relationships among males, and determine who gets access to estrous females.<ref name="Tyndale 2005"/> Alpha males make agonistic behaviours and more sexual behaviours until they are overthrown. Displaced males live alone and avoid close contact with others.<ref name="Tyndale 2005"/>

[[File:- fightingFighting red kangaroos 1.jpg|thumb|right|Fighting red kangaroos]]

===Reproduction===