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The nymph of the gray sanddragon is large in size with a length of 1 inch (25 mm). This dragonfly nymph is sandy brown in color and has short legs covered with stiff bristles. Its abdomen turns up at the tip, and there is a single, rear-facing spine on every side of abdominal segments three through nine.
Nymph of Libellula saturata from California. [3] An immature flame skimmer feeds mainly on aquatic insects. Its diet consists of mosquito larvae, aquatic fly larvae, mayfly larvae, freshwater shrimp, small fish, and tadpoles. The nymphs, which live in the mud at the bottom of warm streams or ponds, catch their prey by waiting patiently for it ...
Dragonfly nymphs may swallow cercariae, or these may tunnel through a nymph's body wall; they then enter the gut and form a cyst or metacercaria, which remains in the nymph for the whole of its development. If the nymph is eaten by a frog, the amphibian becomes infected by the adult or fluke stage of the trematode. [88]
The green darner is a large dragonfly; males grow to 76 mm (3.0 in) in length with a wingspan up to 80 mm (3.1 in). [9] [10] Females oviposit in aquatic vegetation, eggs laid beneath the water surface. Nymphs (naiads) are aquatic carnivores, feeding on insects, tadpoles, and small fish.
The pronghorn clubtail is a medium-sized dragonfly with a length of 1 7/8 to 2 1/8 inches (47 to 54 mm). Its face and its thorax are olive green, with the thorax marked with dark brown stripes. Its abdomen is dark brown to black and is marked along the top with a line of elongated, triangular-shaped marks varying in color from greenish to yellow.
Since nymphs are aquatic and adults are terrestrial, their habitats are quite different. The preferred habitat of Cordulegastridae nymphs are small lotic or flowing streams with clean sand and silt substrates. [10] [7] Adults on the other hand fly above clear streams and small rivers in the woods, with females only entering the water to lay ...
Damselflies tend to be less robust, and appear weaker in flight; their wings are narrow near the base and (in most species) held folded back over the abdomen when perched. Dragonfly eyes occupy much of the animal's head, touching (or nearly touching) each other across the face. In damselflies, there is typically a gap in between the eyes.
The nymphs of damselflies have been less researched than their dragonfly counterparts, and many have not even been identified. They choose their prey according to size and seem less able to overpower larger prey than can dragonfly nymphs. The major part of the diet of most species appears to be crustaceans such as water fleas. [25]
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