In biology, mating is the pairing of opposite-sex or hermaphroditicorganisms, usually for the purposes of reproduction. Some definitions limit the term to pairing between animals, while other definitions extend the term to mating in plants and fungi. Fertilization is the fusion of both sex cell or gamete. Copulation is the union of the sex organs of two sexually reproducing animals for insemination and subsequent internal fertilization. Mating may also lead to external fertilization, as seen in amphibians, fishes and plants. For the majority of species, mating is between two individuals of opposite sexes. However, for some hermaphroditic species, copulation is not required because the parent organism is capable of self-fertilization (autogamy); for example, banana slugs.
For animals, mating strategies include random mating, disassortative mating, assortative mating, or a mating pool. In some birds, it includes such behaviors as nest-building and feeding offspring. The human practice of mating domesticated animals and of artificially inseminating them is part of animal husbandry.
The Blue-tailed Damselfly, Ischnura elegans, is a European damselfly.
Adult male Blue-tailed Damselflies have a head and thorax patterned with blue and black. They have a largely black abdomen with very narrow pale markings where each segment joins the next. Segment eight, however, is entirely pale blue.
Female Blue-tailed Damselflies come in a variety of colour forms, including a pink form, a violet form and a pale green form. Purple/violet, pink and green forms are juvenile, with the colour darkening as the damselfly ages. Mature female damselflies are usually brown/green, or blue which is an andromorph form.
Damselfly nymphs are aquatic, and prey on small aquatic insects or other aquatic larvae. The adult damselflies prey on small flying insects, caught using their legs like a basket to scoop the prey up while flying, or insects taken from leaves.
At rest, the wings of most damselfly species are held back together, unlike dragonflies, which rest with their wings out flat.