No species are known to hunt at night, but some are crepuscular, perhaps taking advantage of newly hatched flies and other aquatic insects at a time when larger dragonflies are roosting. Image: Andrew Howells © Australian Museum Thank you for reading. Damselflies are insects of the suborder Zygoptera in the order Odonata. Rambur's forktail (Ischnura ramburii) has been found, for example, on oil rigs far out in the Gulf of Mexico. Larvae breathe through three long leaf-like gills at the end of their body. And after the larvae stage the damselfly emerges from the water and flies to either feed or mate.  The female inserts the eggs by means of her ovipositor into slits made in water plants or other underwater substrates and the larvae, known as naiads or nymphs, are almost all completely aquatic. They have three stages in their life cycle: egg - larva - adult. In species such as the banded demoiselle, Calopteryx splendens the males have both a darker green body and large dark violet-blue patches on all four wings, which flicker conspicuously in their aerial courtship dances; the females have pale translucent greenish wings. This process is called incomplete metamorphosis, and it occurs in grasshoppers, crickets, bugs, dragonflies, and cockroaches. They also have very large eyes. The Australian Museum will reopen to the public on Saturday 28 November after a 15 month $57.5m building transformation, and general admission will be FREE to celebrate the reopening of this iconic cultural institution. Receive the latest news on events, exhibitions, science research and special offers. The pair often remain together with the male still clasping the female while she lays eggs within the tissue of plants in or near water using a robust ovipositor. In a study of the European common blue damselfly, every adult insect was infected at the height of the flying season. Dragonflies and damselflies are related. It tolerates high levels of zinc and copper in the sediment but requires suitable emergent plants for egg-laying without the water being choked by plants. In spring they hatch out in the meltwater pools and the nymphs complete their development before these temporary pools dry up. Damselflies are known as hemimetabolous insects, which does not have a pupa stage in their life cycle.  Species markers include quadrangular markings on the wings known as the pterostigma or stigma, and in almost all species, there is a nodus near the leading edge. Spreadwings fully fold their wings when roosting. The tenth segment in both sexes bears cerci and in males, its underside bears a pair of paraprocts.  Exceptions include the Hawaiian Mealagrion oahuense and an unidentified Megapodagrionid from New Caledonia, which are terrestrial in their early stages. All the fossils of that age are of adults, similar in structure to modern damselflies, so it is not known whether their larvae were aquatic at that time.  In Hawaii, the introduction of the mosquitofish (Gambusia affinis) was effective in controlling mosquitoes but nearly exterminated the island's endemic damselflies. , All damselflies lay their eggs inside plant tissues; those that lay eggs underwater may submerge themselves for 30 minutes at a time, climbing along the stems of aquatic plants and laying eggs at intervals. They live for a few weeks to a few months and fly mainly during the daytime (diurnal). Damselflies are insects. Life Cycle: Adults emerge in the spring, summer or fall. Most damselflies emerge in daytime and in cool conditions the process takes several hours. Having reached sexual maturity, this new generation will start searching for mates and begin the life cycle again. They have three stages in their life cycle: egg - larva - adult. In tropical South America, helic…  A possible exception is an apparent instance of ovo-viviparity, in which Heliocypha perforata was filmed in western China depositing young larvae (presumably hatched from eggs inside the female's body) onto a partly submerged branch of a tree. When present in large numbers, these parasites can cause death by blocking the gut. This website may contain names, images and voices of deceased Aboriginal and Torres Strait Islander peoples. Calopteryx males will hover in front of a female with alternating fast and slow wingbeats; if she is receptive she will remain perched, otherwise she will fly off. They choose their prey according to size and seem less able to overpower larger prey than can dragonfly nymphs. Adult damselflies live near streams, lakes and ponds. The male then grasps the female by the head with the claspers at the end of his abdomen; the structure of the claspers varies between species, and may help to prevent interspecific mating. Damselflies can spend anywhere from two months to three years as nymphs, depending on environmental conditions. Image credit: gadigal yilimung (shield) made by Uncle Charles Chicka Madden. Their life cycle includes three stages – egg, nymph and adult. They also have very large eyes. The nymphs are aquatic, with different species living in a variety of freshwater habitats including acid bogs, ponds, lakes and rivers.  Flying in tandem has the advantage that less effort is needed by the female for flight and more can be expended on egg-laying, and when the female submerges to deposit eggs, the male may help to pull her out of the water. The exoskeleton hardens and the colours become more vivid over the course of the next few days. Unlike butterflies, damselflies do not hide away inside a pupa to transform into their adult form. They have three stages in their life cycle: egg - larva - adult. When fully developed, the nymphs climb out of the water and take up a firm stance, the skin on the thorax splits and the adult form wriggles out.  Some Coenagrionid damselflies show male-limited polymorphism, an even less understood phenomenon.  The pair fly in tandem with the male in front, typically perching on a twig or plant stem.  They suck the body fluids and may actually kill young nymphs, but adults are relatively unaffected, it being necessary for the completion of the mite's life cycle that it returns to water, a feat accomplished when the adult damselfly breeds. , Mating in damselflies, as in dragonflies, is a complex, precisely choreographed process involving both indirect insemination and delayed fertilisation. Dragonfly nymphs can forcibly expel water in their rectum for rapid escape. They are well … They are similar to dragonflies, which constitute the other odonatan suborder, Anisoptera, but are smaller, have slimmer bodies, and most species fold the wings along the body when at rest, unlike dragonflies which hold the wings flat and away from the body. The male then clasps the female behind the head with claspers on the tip of his abdomen and mating pairs can be … Most species require 1 or 2 years for one generation. Damselfly nymphs differ from dragonflies nymphs in that they possess caudal gills (on the abdomen) whereas dragonflies breathe through the rectum. They have four stages in their life cycle: egg - tadpole - metamorph - adult. The thorax houses the flight muscles. Male members of the family Protoneuridae with vividly coloured wings display these to visiting females. Lacewings are solitary but they may group together or swarm during mating. The top of the head bears three simple eyes (ocelli), which may measure light intensity, and a tiny pair of antennae that serve no olfactory function but may measure air speed. In the later stages, the wing pads become visible. It pumps haemolymph into its small limp wings, which expand to their full extent. The life cycle of the dragonflies and damselflies is fascinating as they spend most of their life underwater. When damselflies breed, the male will attach the back of his abdomen to the female's head and in this position they fly together. The exceptional species are Hawaiian Mealagrion Oahuense and an unnamed …  If successful, a rival male uses his penis to compress or scrape out the sperm inserted previously; this activity takes up much of the time that a copulating pair remain in the heart posture. More than 80 per cent of their brain is used to make sense of what they see. 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