During courtship, males emit loud coughs.

During their courtship, Isabella treasured the letters, poems, and sonnets he sent her as gifts.

During courtship the male newt " displays " for his prospective mate by vibrating his tail in front of the female in a distinctive fashion.

During courtship the male sings whilst he runs and postures, exhibiting his snowy breast, and when displaying he will take long and high flights, like those of the Common Kingfisher, accompanied by sharp metallic calls clink, clink, different from the normal zil.

During his courtship of Dolly, Grey still saw previous girlfriends and warned her frankly, " But I love to be free.

During courtship, they exhibit a nuptial display by soaring high with undulating flight patterns and calling with guttural croaking.

During courtship the male and female will sit together and pass small objects back and forth, such as flower petals or an insect.

During courtship, the pair may pass a flower petal or insect back and forth repeatedly.

During courtship, the orbital skin and distal quarter of bill are orange-coloured with the pouch variously turning dark blue, pink and scarlet.

During courtship, the male gives a raah-rahh call with wide-open bill, makes noisy wingbeats and whoom-whoom-whoom calls in flight, and sometimes calls roo-roo to the female before landing again.

During courtship, when the males chase the females, they often flatten the underbrush leaving behind areas of the forest in the shape of a figure eight called ' roe rings '.

During courtship, the male feeds seed to the female beak-to-beak.

During courtship they may also participate in a bonding behavior where the male collects food and brings it to the female, feeding her beak-to-beak.

This cry is given in flight or from a perch every 15 – 30 s. During courtship, both sexes have been recorded to give a whistling sound that changes to a hiss.

During the courtship displays, the male makes a rapid tik-tik tik-tik tik-tik sound, apparently with his wings.

During courtship, a male consorts with an estrous female, following and sniffing her.

During courtship, and occasionally at other times, it uses a mechanical signal, a sharp cracking sound, caused by clapping the wings together over the back.

During courtship, the male and female fly in wide circles while uttering shrill cries.

During courtship, females display themselves in 3 unique ways.

During courtship, a couple get to know each other and decide if there will be an engagement or other such agreement.

During courtship they secrete a fluid from this gland and offer it to the female.

During courtship, the males wave their oversized claws high in the air and tap them on the ground in an effort to attract females.

During courtship, the male and female fly about each other prior to landing and mating.

During another night out at the pub, Arthur meets Doreen, a young unmarried girl with whom he begins a relatively innocent courtship — all the while keeping Brenda and Winnie a secret.

During the breeding season, unpaired male aardwolves will search their own territory, as well as others ', for a female to mate with.

During the breeding season, the male call of this marsh-dwelling bird is a " low pitched boom "; hence, it is occasionally called the " bunyip bird ".

During copulation, the male stands on its hind legs with its head held up and its front legs resting on the female's sides.

During the next 25 years, only two jaguars were documented in the United States, both killed: a large male shot in 1971 near the Santa Cruz River by two teenage duck hunters, and another male cornered by hounds in the Dos Cabezas Mountains in 1986.

During the germination period of reproduction the fish are exposed to low levels of estrogen which may cause reproductive dysfunction to male fish.

During sexual intercourse using condoms, for example, the male might intentionally pull off the condom and continue penetrating without the female ( or male receptive partner )' s consent and notice.

During the winter molt it sheds all its feathers ; in the spring, it sheds all but the wing and tail feathers, which are dark brown in the female and black in the male.

During World War II, women performed roles some of which would otherwise have been considered male jobs

During the process, the female supports the male by keeping him clasped with the claws of her last pair of legs.

During this time, a succession of her male relatives held the title of regent.

During the Middle Ages, the territories of the German nobility were divided equally among the male heirs.

During the first two years of the Open Era a large number of male players began playing professionally, and the tournaments in which they competed, often men's and women's combined events, attracted increased investment.

During breeding season, the male will attempt to attract females by calling.

During a question-and-answer session, a young white male asked Meredith if he had taken part in a formal rush program.

During the breeding season, an adult male is accepted into the band of females and juveniles near the beginning of the breeding season, leading to a polygynous mating system.

During the breeding season, one can easily distinguish the sexes-the male is far darker than the female, with a tall wavy and transparent crest along the spine and tail, with dark spots covering the rest of the body, including the stomach area, which is a far more vivid pink or orange than it is in winter and autumn.

During the breeding season, male smooth newts develop a continuous wavy ( rather than jagged ) crest that runs from their head to their tail, and their spotted markings become more apparent.

During puberty, an increase in male sex hormones called androgens cause the follicular glands to grow larger and make more sebum.

During his career writing for DC Comics, Fox also wrote novels and short stories under a variety of male and female pseudonyms for a number of publishers, including Ace, Gold Metal, Tower, Belmont, Dodd Mead, Hillman, Pocket Library, Pyramid Books and Signet Books.

During gestation, the cells of the primordial gonad that lie along the urogenital ridge are in a bipotential state, meaning they possess the ability to become either male cells ( Sertoli and Leydig cells ) or female cells ( follicle cells and Theca cells ).