Dragonflies belong to the order of insects called
Odonata. The insects have incomplete metamorphosis
consisting of egg, nymph and adults. Most of the nymphs
are extreme predators and will eat small fish, other insects
and just about anything they can get a hold of. The
nymphs use extractable jaws to grab their prey. They can
also shoot water through their bodies in form propulsion to
intercept prey or escape. The adults feed on mosquitoes and
other flies and can usually live up to 3 or 4
months.
Dragonfly
nymphs are an important trout food in many waters and
large nymph imitations will take some big fish. In
lakes and ponds they are also an important food source.
Many good underwater bass flies owe their success to
dragonfly nymphs which are eagerly sought after by
bass.
Dragon
fly nymphs tend to be amber to brownish grey no matter
where you find them. Mature nymphs are the best to
imitate and they emerge by usually crawling up a stick or
plant material. The nymph form can last a few
months up to 5 years in some species. The video below
will give you a good indication of their
behavior.