Males may clean the inside of the cavity with their suckermouth before allowing the female to approach and inspect the nest.

Males are much smaller in size than the females, and they typically possess a specialized abdominal appendage which is used in mating to grasp a female from behind, pry open her carapace, insert a spermatheca, and thus fertilize the eggs.

Males will clean the eggs and the cavity with its fins and mouth.

Breeding is also possible: Males attract females to small cave or hollow, then guard eggs after fertilization through hatching ( 4 – 8 days ) until fry are free swimming ( 4 – 6 days after hatching ); the aquarist need only supply a suitable cave, food, and one of each sex.

Males returning from a foraging trip will frequently copulate on return, as this increases the chances of his sperm fertilizing the eggs rather than a different male.

Males are identified by their swollen cloacae lined with papillae, while females are noticeable for their wider bodies full of eggs.

Males defend the nest by standing guard nearby while the female incubates the eggs and broods the young.

Males establish small territories and mate with a female who lays a first clutch of eggs.

Males often killed their mates and captive breeding was achieved by artificial insemination and the hatching of eggs by other crane species such as the Sandhill and using floodlights to simulate the longer daylengths of the Arctic summer.

Males may sometimes form polygynous associations, typically with two females that may lay their eggs in the same nest.

Males are also known to guard the brood of spherical eggs.

Males attach a spermatophore to the females, which is then used to fertilize the eggs as they are released.

Males remain with the females until the eggs hatch, which spans the incubation period of about 23 days.

Males are smaller than females and alone care for the eggs and young.

Males defend these eggs from predators, and continuously fan them to provide the developing embryos with oxygenated water.

Males tend to stay high up in trees, females come down to lower levels to lay eggs.

Males will occasionally consume eggs from their own clutch, likely to provide supplemental nourishment while guarding their nest.

Males trail the female and fertilize the eggs.

Males can sometimes be polygynous but this is usually correlated to the male ’ s size and to how many eggs he can guard at one time.

Males can be infertile due to congenital absence of the vas deferens.

Males have a white throat and brow stripe bordered by black.

Males maintain and improve their social ranks by forming coalitions.

* Sexuality and Eroticism Among Males in Moslem Societies by Arno Schmitt and Jehoeda Sofer ( eds.

Males play their part by defending the territories and maintaining the burrows.

* The Oldest Dead White European Males and Other Reflections on the Classics by Bernard Knox ( ISBN 9780393312331.

Males tend to be slightly larger than females and have slightly bigger heads, but there is not a great variation in cheetah sizes and it is difficult to tell males and females apart by appearance alone.

Males mark their territory by urinating on objects that stand out, such as trees, logs, or termite mounds.

Males are considered inferior to females within drow society, and while some males may be respected if they are powerful wizards ( notably exemplified by Gromph Baenre ), they are never allowed to rule.

Males were almost as likely to have positions of authority over both males and females, and the tradition of Matriarchy, where the highest ranking member was always a female, was not a special directive of the Demon Queen Lolth but rather had been a reality in Drow society since the earliest times attributed naturally to a few ability scores by the male gender being on average inferior, and particularly due to the ' wisdom ' ability rating being on average quite inferior to the females.

Males attract females by singing, and, in the case of the Resplendent Quetzal, undertaking display flights.

Males can be distinguished from their female counterparts by two structures: the spicules and gubernaculum.

Males are further distinguished from females by broader, higher foreheads, flatter snouts, and darker, slightly tuftier hair around their large necks, giving them a maned appearance.

Males are absent within the species, and females reproduce only by parthenogenesis.

Males lay up to 200 spermatophores a week, which are held off the ground by a short stalk and probably only remain viable for about two days.

Males generally choose an elevated and exposed location, so their milt can be broadcast by sea currents.

Males and females are hard to distinguish visually, but can be differentiated by the types of loud sounds they emit by manipulating an inflatable neck sac.

Males and females cooperate in building a pillar-shaped mud nest, and both incubate the egg laid by the female.

Males display to each other by positioning themselves parallel to each other, head to tail, with dorsal and caudal fins erect and cheek odontode spines everted.

Males in particular are forcibly driven out by the workers.

Males and females are about the same size, and do not differ conspicuously in appearance except by direct comparison.

Males give increasingly vocal displays and show off the white markings of the wings in flight and of the tail by fanning it and turning away from the female.

Males and females can also perform a grounded display by chasing each other with their wings up and back, much like the way they chase prey.

Males and females are sexually mature in their first year, usually by 4-5 months old.