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River jewelwing

River jewelwing

Calopteryx aequabilis

A species of Demoiselles

The male has a metallic blue-green body and black wing tips. The female is duller brown with smoky wing tips that have white spots near the tips. The naiad is pale brown with darker markings.

General Info About River jewelwing
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Attributes of River jewelwing
Colors
Black
Green
Blue
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The River jewelwing is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
The River jewelwing typically preys on other arthropods and does not directly affect plants.
Biting animal or pet
Yes
Mouthparts Type
Chewing mouthparts
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Life Cycle of River jewelwing
Egg Deposited in or near water, the eggs of river jewelwing are generally elongated and are laid singly or in batches. They are known to be opaque or translucent and may change color as they mature.
Naiad Emerging from the eggs, river jewelwing naiads resemble small adults but lack wings and have external gills for aquatic respiration. As they grow, they shed their exoskeleton multiple times, becoming larger with each molt.
Adult Transforming from the final nymph stage, the adult river jewelwing develops fully formed wings and gains the ability to fly. The body structure is elongated, and coloration is generally metallic or iridescent, which becomes more pronounced as they age.
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Adult Size of River jewelwing
4.5 - 5 cm
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Predators of River jewelwing Larvae
Fish, tadpoles, water beetles, birds, other aquatic insect larvae
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Predators of Adult River jewelwing
Birds, spiders, frogs, robber flies, dragonflies, mantises
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Interesting Facts About River jewelwing
Some river jewelwing are capable of 'oblique flight', allowing them to maneuver and hover with extraordinary precision.
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Scientific Classification of River jewelwing
Tips for Finding River jewelwing
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How Can You Attract River jewelwing
Adult river jewelwing typically feed on flying insects, so any trap intending to attract them should include or mimic such prey. For the larval stage, live baits that resemble aquatic prey could be employed.
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Habitat Preferences of River jewelwing Through Different Life Stages
The eggs of river jewelwing are typically laid in vegetation near or in freshwater sources like rivers or streams where the water flows gently, to secure the needed moisture for their development. The naiads, after hatching, remain within the aquatic environment where they undergo several molts and can be found among submerged plant stems and debris, skillfully camouflaging and preying on other aquatic organisms. Searching for the naiads involves sifting through the aquatic substrates, turning rocks, and examining the undersides of leaves. The adult river jewelwing, having undergone metamorphosis, often frequents areas adjacent to where they were as naiads, preferably on sunlit foliage or darting over the water surface. To observe the adults, one can walk along the banks of the water bodies and look among surrounding vegetation during the warmer parts of the day when they are most active.
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When is the Best Time to Observe River jewelwing
The best time to find adult river jewelwing is usually on warm, sunny days, preferably in the morning or late afternoon when they are most active. For naiads, time is less of a factor as they are aquatic and less affected by time of day.
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What is the Best Weather to Observe River jewelwing
Warm and sunny weather is ideal for spotting adult river jewelwing, as they are less active during cold or rainy days. naiads, being aquatic, can be found regardless of weather, but calm, non-turbulent water conditions may facilitate their observation.
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How and Where Can You Find River jewelwing at Different Life Stages
Egg River jewelwing eggs are typically laid on vegetation near or in water. To find them, carefully observe the stems and leaves of aquatic plants for small, cylindrical or spindle-shaped eggs.
Naiad River jewelwing naiads live underwater clinging to submerged vegetation or debris. Search for them by gently disturbing the water near plants and examining the debris that floats up or by using a net to sift through the aquatic vegetation.
Adult During emergence, river jewelwing can be found near the water's edge, especially on plants or rocks where they climb out of their naiadl skin. Look for them during early morning hours when emergence is most common.
River jewelwing adults can be found flying around water bodies such as streams, rivers, and lakes. They perch on vegetation, so scanning overhanging branches, twigs, and leaves can be an effective way to spot them during their most active times.
Are River jewelwing harmful?
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Beneficial Effects of River jewelwing
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Predators of Pests
Predators of Pests
Stage
Adults, Naiads
Diets
Aquatic Insects
River jewelwing naiads develop in water and actively hunt small aquatic prey. Adults catch prey mid-flight, using their precision and speed. In both stages, they consume pests to sustain their own energy needs. Intriguingly, they are one of the few insect predators that can hunt throughout their life cycle.
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