Animal sexual behaviour

copulationanimal sexual behaviorsexual behaviorpolygamoussexual behaviourpolygamysexual activityAnimal sexualitypolygynouspromiscuous
Animal sexual behavior takes many different forms, including within the same species.wikipedia
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Homosexual behavior in animals

homosexualHomosexuality in animalsHomosexual behaviour
Other sexual behaviour may be reproductively motivated (e.g. sex apparently due to duress or coercion and situational sexual behaviour) or non-reproductively motivated (e.g. interspecific sexuality, sexual arousal from objects or places, sex with dead animals, homosexual sexual behaviour, and bisexual sexual behaviour).
This may include same-sex sexual activity, courtship, affection, pair bonding, and parenting among same-sex animal pairs.

Copulation (zoology)

copulationcopulatecopulatory
When animal sexual behaviour is reproductively motivated, it is often termed mating or copulation; for most non-human mammals, mating and copulation occur at oestrus (the most fertile period in the mammalian female's reproductive cycle), which increases the chances of successful impregnation.
In zoology, copulation is animal sexual behavior in which a male introduces sperm into the female's body, especially directly into her reproductive tract.

Superb fairywren

superb fairy-wrenMalurus cyaneussuperb fairy wren
The highest known frequency of extra-pair copulations are found among the fairy-wrens, lovely tropical creatures technically known as Malurus splendens and Malurus cyaneus.
Like other fairywrens, the superb fairywren is notable for several peculiar behavioural characteristics; the birds are socially monogamous and sexually promiscuous, meaning that although they form pairs between one male and one female, each partner will mate with other individuals and even assist in raising the young from such pairings.

Polygyny in animals

polygynouspolygynypolygamous
Technically, polygyny in sociobiology and zoology is defined as a system in which a male has a relationship with more than one female, but the females are predominantly bonded to a single male.
Systems where several females mate with several males are defined either as promiscuity or polygynandry.

Mating

matematescopulation
Common mating or reproductively motivated systems include monogamy, polygyny, polyandry, polygamy and promiscuity.
Vertebrates (such as reptiles, some fish, and most birds) reproduce with internal fertilization through cloacal copulation (see also hemipenis), while mammals copulate vaginally.

Seasonal breeder

breeding seasonmating seasonbreeding period
Many animal species have specific mating (or breeding) periods e.g. (seasonal breeding) so that offspring are born or hatch at an optimal time.
Related sexual interest and behaviors are expressed and accepted only during this period.

Canine reproduction

copulatory tiematingcoitus
These may be annual (e.g. wolves), biannual (e.g. dogs) or more frequently (e.g. horses).
2. Estrus follows, in which estrogen levels are high, mature eggs are released from both ovaries, and females become receptive both physically and mentally to copulation.

Estrous cycle

estrusoestrusestrous
When animal sexual behaviour is reproductively motivated, it is often termed mating or copulation; for most non-human mammals, mating and copulation occur at oestrus (the most fertile period in the mammalian female's reproductive cycle), which increases the chances of successful impregnation.
Another difference is sexual activity.

Alternative mating strategy

Alternative male strategiesalternative mating strategiesalternative reproductive tactics
Alternative male strategies which allow small males to engage in cuckoldry can develop in species such as fish where spawning is dominated by large and aggressive males.
Animal sexual behaviour and mate choice directly affect social structure and relationships in many different mating systems, whether monogamous, polygamous, polyandrous, or polygynous.

Emperor penguin

emperor penguinsAptenodytes forsteriEmperor
These pairs may last for a lifetime, such as in pigeons, or it may occasionally change from one mating season to another, such as in emperor penguins.
Before copulation, one bird bows deeply to its mate, its bill pointed close to the ground, and its mate then does the same.

Earthworm

earthwormsLumbricinanightcrawlers
In hermaphroditic animals, the costs of parental care can be evenly distributed between the sexes, e.g. earthworms.
Copulation and reproduction are separate processes in earthworms.

Monogamy in animals

monogamousmonogamymonogamous pairs
Common mating or reproductively motivated systems include monogamy, polygyny, polyandry, polygamy and promiscuity.

Pair bond

pair bondingpair-bondingmate for life
A monogamous mating system is one in which individuals form long-lasting pairs and cooperate in raising offspring.

Non-reproductive sexual behavior in animals

Interspecific matingMasturbationOral sex
Other sexual behaviour may be reproductively motivated (e.g. sex apparently due to duress or coercion and situational sexual behaviour) or non-reproductively motivated (e.g. interspecific sexuality, sexual arousal from objects or places, sex with dead animals, homosexual sexual behaviour, and bisexual sexual behaviour).
Non-reproductive sexual behavior consists of sexual activities animals participate in that do not lead to the reproduction of the species.

Traumatic insemination

hypodermic inseminationimpregnatingtraumatically inseminate
Traumatic insemination, also known as hypodermic insemination, is the mating practice in some species of invertebrates in which the male pierces the female's abdomen with his aedeagus and injects his sperm through the wound into her abdominal cavity (hemocoel).

Dolphin

dolphinsgenital slitaquatic mammal
It is often assumed that animals do not have sex for pleasure, or alternatively that humans, pigs, bonobos (and perhaps dolphins and one or two more species of primates) are the only species that do.
Dolphin copulation happens belly to belly; though many species engage in lengthy foreplay, the actual act is usually brief, but may be repeated several times within a short timespan.

Panda pornography

videos of giant pandas mating
Panda pornography (or panda porn) refers generally to movies depicting mating pandas, intended to promote sexual arousal in captive giant pandas.

Dominance (ethology)

dominancedominantdominance hierarchies
When nine out of ten pairings occur between males, "[e]very male that sniffed a female was reported as sex, while anal intercourse with orgasm between males was only [categorized as] 'revolving around' dominance, competition or greetings."
A dominant animal is one whose sexual, feeding, aggressive and other behavior patterns subsequently occur with relatively little influence of the other group members.

White-fronted bee-eater

Merops bullockoideswhite-frontedWhite-fronted bee eater
Female white-fronted bee-eaters are subjected to forced copulations.
Colonies comprise socially monogamous, extended family groups with overlapping generations, known as "clans", which exhibit cooperative breeding.

Orgasm

sexual gratificationfemale orgasmclimax
When nine out of ten pairings occur between males, "[e]very male that sniffed a female was reported as sex, while anal intercourse with orgasm between males was only [categorized as] 'revolving around' dominance, competition or greetings."
They quote primate sexuality specialist Alan Dixson in saying that the monogamy-maintenance explanation for female orgasm "seems far-fetched" because "females of other primate species, and particularly those with multimale-multifemale [promiscuous] mating systems such as macaques and chimpanzees, exhibit orgasmic responses in the absence of such bonding or the formation of stable family units."

Greater short-nosed fruit bat

Cynopterus sphinxfemale fruit batgreater
Copulation by males is dorsoventral and the females lick the shaft or the base of the male's penis, but not the glans which has already penetrated the vagina.

Lordosis behavior

lordosislordosis behaviourmating stance
The female may exhibit lordosis in which she arches her back ventrally to facilitate entry of the penis.
Lordosis occurs during copulation itself and in some species, like the cat, during pre-copulatory behavior.

Green Porno

Green Porno is a series of short films on animal sexual behaviour.

Emotion in animals

emotional painemotionsanimal emotion
On the other hand, it is impossible to know the subjective feelings of animals, and the notion that non-human animals experience emotions similar to humans is a contentious subject.

Bottlenose dolphin

Tursiopsbottlenose dolphinsbottle-nosed dolphin
Male bottlenose dolphins have been observed working in pairs to follow or restrict the movement of a female for weeks at a time, waiting for her to become sexually receptive.
Dolphins have been observed engaging in intercourse when the females are not in their estrous cycles and cannot produce young, suggesting they may mate for pleasure.