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Gorilla Great reed warbler. When two animals mate, they both share an interest in the success of the offspring, though often to different extremes. Unless the male and female are perfectly monogamous, meaning that they mate for life and take no other partners, even after the original mate's death, the amount of parental care will vary. [7]
Deer of the World: Their Evolution, Behaviour, and Ecology. Stackpole Books. ISBN 978-0-8117-0496-0. Jim Heffelfinger (8 September 2006). Deer of the Southwest: A Complete Guide to the Natural History, Biology, and Management of Southwestern Mule Deer and White. Texas A&M University Press. ISBN 978-1-60344-533-7. David G. Hewitt (24 June 2011).
Secondary sex characteristics are particularly evident in the sexually dimorphic phenotypic traits that distinguish the sexes of a species. [5] In evolution, secondary sex characteristics are the product of sexual selection for traits that show fitness, giving an organism an advantage over its rivals in courtship and in aggressive interactions. [6]
Both male and female reindeer grow antlers. This is a trait that no other species in the deer family possesses. The reason, a peculiar result of circumstances and biological luck, reflects
The female-biased sexual size dimorphism observed in many taxa evolved despite intense male-male competition for mates. [28] In Osmia rufa, for example, the female is larger/broader than males, with males being 8–10 mm in size and females being 10–12 mm in size. [29] In the hackberry emperor females are similarly larger than males. [30]
female reindeer with antlers. It's always easy to tell bucks from does in many of the deer species, because bucks (male deer) have antlers and does (female deer) don't.
Reindeer, or caribou, are members of the deer family Cervidae.Deer, elk, moose, and wapiti are also members of this family. The distinction between reindeer and caribou depends on where they live.
The mammalian female reproductive system contains three main divisions: the vagina and uterus, which act as the receptacle for the sperm, the ovaries, which produce the female's ova, and the vulva, which consists of the labia and clitoris. The vagina, uterus and ovaries are always internal while the vulva is external.