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 will perform a ritualised dance which includes actions that mimic the skewering of prey on thorns and will feed the female.

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 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 reentry ( point G ), the astronaut would experience about 8 g-forces on an orbital mission, and 11 – 12 gs on a suborbital mission.

During the Second World War German scientists researched an orbital weapon that could utilize the sun's energy.

During Dish Network's quest for capacity, they had accumulated an array of satellite broadcasting technologies, orbital locations, and surplus capacity using non-mainstream technologies requiring larger dish sizes.

During the interplanetary cruise phase, communication with the spacecraft was lost on August 21, 1993, 3 days prior to orbital insertion.

During a satellite pass, a GE receiver would receive the orbital parameters and encrypted messages from the satellite, as well as measure the Doppler shifted frequency at intervals and provide this data to the AN / UYK-1 computer.

During the great geomagnetic storm of March 1989, four of the Navy's navigational satellites had to be taken out of service for up to a week, the U. S. Space Command had to post new orbital elements for over 1000 objects affected, and the Solar Maximum Mission satellite fell out of orbit in December the same year.

During this period, Junkers employed the famous Austrian engineer and space travel theorist, Eugen Sänger, who in 1961 completed work for the design of an advanced orbital spacecraft at Junkers.

During every orbital cycle, each star eclipses the other, resulting in a decrease in magnitude.

During this mission, Musgrave served as the systems engineer during launch and entry, and as a pilot during the orbital operations.

During the 16-day, 21-hour mission, the crew of Columbia assisted in the preparations for the International Space Station by studying the effects of long-duration spaceflight on the human body in readiness for ISS Expeditions, and also carried out experiments similar to those now being carried out on the orbital station.

During the Earth's 243 sidereal orbital periods, which total 88757. 3 days, Venus completes 395 sidereal orbital periods of 224. 701 days each, equal to 88756. 9 Earth days.

During the flight, a docking of the Soyuz T-3 spacecraft with the Salyut 6-Process-11 orbital complex was accomplished.

During the spacecraft glow investigation, Columbias orbital altitude was lowered to, the lowest ever flown by a Space Shuttle.

During the MA-9 postflight press conference on 19 May, Robert C. Seamans was asked about the possibility of a fifth orbital flight, and described it as " quite unlikely ".

During an interview in the documentary Black Sky: The Race For Space, Rutan stated that Tier One will cover suborbital flights, Tier Two will cover orbital flights, and Tier Three will cover flights beyond Earth's orbit ( including flights to the moon and other planets ).

During the 1950s and 1960s the USSR used a number of dogs for sub-orbital and orbital space flights to determine whether human spaceflight was feasible.

During reentry, the cosmonauts ejected both the orbital module and the service module simultaneously in an effort to minimize the chances that a blanket could snag.

During this time it made some orbital adjustments, raising its orbit.

During their four-month stay, the crew saw the orbital complex expand and research work grow.

During the L3 complex's journey to the Moon, there was no need to undock and redock the orbital and landing craft as in Apollo, because the cosmonaut would transfer from the LOK to LK by a " spacewalk ", while in Apollo this operation was executed by an internal passage.

During his time with Mid-South, Duggan would get into a confrontation with a fan and fracture the orbital floor of the fan's eye socket.

During corrective surgery fibrous attachments have been found connecting the horizontal recti and the orbital walls and fibrosis of the lateral rectus has been confirmed by biopsy.

During World War II Nazi Germany also was developing plans for an orbital weapon called the Sun gun.