The ability of the dragonfly nymph
to remain in the water for one to five years and feed on aquatic insects, other smaller invertebrates and young fish (fry) is of great biological and economic importance.
Laboratory studies on the predaceous habits on the dragonfly nymph
. Bulletin Calcutta School of Tropical Medicine, 13, 61-62.
Though barely more than microscopic at first, a dragonfly nymph
So year after year, Stainton's students sift through the mud, collect dragonfly nymphs
and ship them to scientists for mercury testing.
Thirteen stomachs examined by Mitchell (1976) were found to contain plant material (including maize-meal porridge, "sadza"), crustacea, mayfly and dragonfly nymphs
, termites, dipteran larvae and pupae, terrestrial insects, a reptile eggshell and fish.
Bloodworm, GRHE, Damsel and Dragonfly nymphs
did well subsurface.
"There is something different to see every day, birds courting and nest building, shelducks strutting on high obstacles, flamingos making nests from mud with their beaks, wetland plants beginning to bloom, dragonfly nymphs
appearing, songbirds singing loud and clear and many other natural spectacles."
Both damselfly and dragonfly nymphs
feed on small aquatic organisms, fish, and tadpoles (Corbet 1999, Colburn 2004), while adults feed on mosquitoes, butterflies, and other winged insects associated with vegetation of aquatic habitats.
The Nature Boardwalk functions as a living laboratory in which to study these interactions, and researchers can be seen doing everything from setting up motion-triggered camera traps to counting dragonfly nymphs
Self-proclaimed odonate (dragonfly and damselfly) enthusiasts, we'd anxiously waited for a day such as this, when dragonfly nymphs
emerge from their aquatic nursery to begin the last, brief chapter of their lives.
Small Heath School pupils learned about river ecology at RSPB's Middleton Lakes, near Tamworth, as they launched their Lifelong Learning Programme The Year 11 children swopped course books and computers for sampling nets used for finding snails, may-fly larvae and dragonfly nymphs
in Langley Brook.
London, June 29 (ANI): A team of scientists has claimed to have solved the curious case of the missing legs in many frogs, by suggesting that the deformed frogs are actually victims of the predatory habits of dragonfly nymphs
, which eat the legs of tadpoles.
True, a person might find collecting dragonfly nymphs
and skins left behind from molting to scrutinize closely under a microscope a strange sort of hobby, but when local naturalists are brought together with scientists and experts from other parts of the country, an exchange of information and experiences occurs that widens the knowledge base of both.
Organiser Jane Maddison said: "It is a bit early for dragonflies at this time of year, but by pond dipping we can find dragonfly nymphs
which live for up to five years before they become dragonflies."
Biological control includes use of many predators (dragonfly nymphs
and other indigenous aquatic invertebrate predators such as Toxorhynchites spp.