Fertilisation is likely to be external as sirenids lack the cloacal glands used by male salamandrids to produce spermatophores and the females lack spermathecae for sperm storage.

With a few exceptions, salamandrids have patterns of bright and contrasting colours.

In most of these, the male deposits a spermatophore, a small packet of sperm on top of a gelatinous cone, on the substrate either on land or in the water.

When the male has identified a suitable location, he deposits the spermatophore and then guides the female over it.

In the beginning of the cycle, a mature female pollinator wasp enters the immature " fruit " ( actually a stem-like structure known as a syconium ) through a small natural opening, the ostiole, which is covered in male flowers, and deposits her eggs in the cavity, which is covered in female flowers.

The male then deposits a sperm-containing capsule, known as a spermatophore, in front of his mate, who manoeuvres herself into a position whereby she can pick up the capsule with her cloaca-fertilization occurring inside the female.

) First the female deposits some eggs with her ovipositor ( a whitish tube descending from her belly ), making a wiggling pass over the surface, then the male follows behind her fertilizing the eggs.

When a male is mature, he spins a sperm web, deposits semen on it, and charges his palpi with the sperm.

In some terrestrial arthropods, including insects representing basal ( primitive ) phylogenetic clades, the male deposits spermatozoa on the substrate, sometimes stored within a special structure.

The male clears a sheltered nest site within his territory, and the female then deposits eggs within the nest.

The female bullfrog deposits her eggs in the water and the male simultaneously releases sperm.

Instead, the male deposits 150 to 450 packages of sperm, or spermatophores, on small stalks.

After performing a courtship display, the male deposits a spermatophore ( a small packet of sperm ) from his cloaca ( reproductive and excretory opening ) in the path of the female.

The female lays up to 38 eggs and the male grasps her and deposits sperm directly onto the eggs.

The female is attracted by the song of the male cricket and deposits larvae on or around him, as was discovered in 1975 by the zoologist William H. Cade.

Once a female fly finds a host ( male cricket ) she deposits a larva which then quickly burrows into the host, emerging about 7-10 days later, killing the host.

In mating, the male deposits spermatophores on the underside of the female's thorax, between the walking legs.

In mating, the male deposits spermatophores on the underside of the female's thorax, between the walking legs.

The male then leads the female forward, bends his body into an S-shaped pattern, and deposits a spermatophore on the substrate.

The paired Müllerian glands inside the male cloaca secrete a fluid which resembles that produced by mammalian prostate glands and which may transport and nourish the sperm.

Certain primitive salamanders in the families Sirenidae, Hynobiidae and Cryptobranchidae practice external fertilisation in a similar manner to frogs, with the female laying the eggs in water and the male releasing sperm onto the egg mass.

An exception is the granular poison frog ( Oophaga granulifera ) where the male and female place their cloacae in close proximity while facing in opposite directions and then release eggs and sperm simultaneously.

* Reproduction-Made possible by the combination of sperm made in the testiculi ( contained in some male cells ' nuclei ) and the egg made in the ovary ( contained in the nucleus of a female cell ).

In species that produce two morphologically distinct types of gametes, and in which each individual produces only one type, a female is any individual that produces the larger type of gamete — called an ovum ( or egg )— and a male produces the smaller tadpole-like type — called a sperm.

In humans, an ovum can carry only an X chromosome ( of the X and Y chromosomes ), whereas a sperm may carry either an X or a Y ; thus the male sperm determines the sex of any resulting zygote, if the zygote has two X chromosomes it will develop into a female, if it has an X and a Y chromosome, it will develop into a male.

The female and male gametes are also called, respectively, egg cells and sperm.

As the female lays eggs, the male positions himself alongside or slightly above them, spraying the eggs with seminal fluid while swaying his tail and moving his hind limbs, which disperses the sperm uniformly.

Scientists initially assumed that she had been able to store sperm from her earlier encounter with a male, an adaptation known as superfecundation.

* male, in biology, the half of a reproduction system that produces sperm cells

They are fertilized by male sperm either inside the female body ( as in birds ), or outside ( as in many fishes ).

Human sex cells ( sperm and egg ) have one complete set of chromosomes from the male or female parent.

* After copulation, male – male competition distinct from conventional aggression may take the form of sperm competition, as described by Parker in 1970.

These include cuckoldry, nuptial gifts, sperm competition, infanticide, physical beauty, mating by subterfuge, species isolation mechanisms, male parental care, ambiparental care, mate location, polygamy, and mechanisms that can only be called bizarre, including homosexual rape in certain male animals, cementing of females ' vaginal pores by males in some lepidopteran insects, and insect penises specialized to remove any sperm packets from females which may have been deposited by previous suitors.

In some, the male places the spermatophore into the female cloaca, in others he guides her to it or restrains her with an embrace called amplexus.

Sexual reproduction is accomplished by the transfer of a spermatophore from the male to the female ; scorpions possess a complex courtship and mating ritual to effect this transfer.

In this " dance ," the male leads the female around searching for a suitable place to deposit his spermatophore.

The mating process can take from 1 to 25 + hours and depends on the ability of the male to find a suitable place to deposit his spermatophore.

In many Australian species, there exist dimples or special dagger-or axe-shaped structures on the head ; the male of Florelliceps stutchburyae presses a long spine against the female's genital opening and probably positions its spermatophore there in this way.

In most species, the male transfers sperm to the female in a package, or spermatophore.

In one clade, this spermatophore is deposited in a web, and the male undertakes a courtship dance to encourage the female to engulf his sperm.

Some species have an elaborate mating dance, where the male pulls a female over a spermatophore previously laid upon a surface.

In advanced groups of insects, the male uses its aedeagus, a structure formed from the terminal segments of the abdomen, to deposit sperm directly ( though sometimes in a capsule called a " spermatophore ") into the female's reproductive tract.

Reproduction can involve direct or indirect sperm transfer ; when indirect, the male emits a spermatophore on the ground and then inserts it with his chelicerae in the female's genital pore.

During mating, male myriapods produce a packet of sperm, or spermatophore, which they must transfer to the female externally ; this process is often complex and highly developed.

These windows are softer than the rest of the exoskeleton, and are thought to help the male locate the correct location to place the tar-like spermatophore.

The male passes a large spermatophore to the female, which can be up to 27 % of his body weight.

During mating, the male places a spermatophore on the female, which she uses to fertilise her eggs.

Females, which are smaller than males, spawn 300 – 800 olive-green eggs per brood, which are fertilised from a spermatophore which the male has deposited at the base of her walking legs ( pereiopods ) during mating.