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Common hawker

Common hawker

Aeshna juncea

A species of Hawker dragonflies, Also known as Rush darner, Sedge darner

The common hawker , moorland hawker or sedge darner ( Aeshna juncea ) is one of the larger species of hawker dragonflies.It is 7 cm long with a brown body. The male has a black abdomen with paired blue and yellow spots on each abdominal segment, and narrow stripes along the dorsal surface of the thorax. In the female, the abdomen is brown with yellow or sometimes green or blue spots. The wings of both sexes display a yellow costa (the major vein running along the leading edge of the wings). This species lacks the green thorax stripes of the southern hawker.

General Info About Common hawker
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Attributes of Common hawker
Colors
Brown
Green
Blue
Habitat
artificial/aquatic & marine; wetlands (inland); forest
Adult Food Sources
Flying insects, mosquitoes, flies, moths, butterflies, mayflies
Larva Food Source
Aquatic insects, tadpoles, small fish, mosquito larvae, other small aquatic organisms
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
The Common hawker typically preys on other arthropods and does not directly affect plants.
Biting animal or pet
Yes
Mouthparts Type
Chewing mouthparts
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Species Status of Common hawker
It is native to Palearctic (from Ireland to Japan) and northern North America. It is distributed in Asia, Europe and the United States. It's extinct in Hungary and Luxembourg, it's probably extinct in Ukraine.
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Adult Size of Common hawker
7 - 7 cm
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Predators of Common hawker Larvae
Aquatic insects such as beetles and backswimmers, fish, amphibians like newts and tadpoles
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Predators of Adult Common hawker
Birds, other dragonfly species, spiders
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Interesting Facts About Common hawker
The larvae of common hawker have a unique labium that can shoot out rapidly to snatch prey, showcasing a remarkable blend of speed and precision in hunting.
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Scientific Classification of Common hawker
Tips for Finding Common hawker
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Youth Habitat of Common hawker
Freshwater Habitats
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Habitat Preferences of Common hawker Through Different Life Stages
The naiads of common hawker, commonly residing in freshwater habitats such as ponds, still lakes, and occasionally slow-moving streams, are found submerged among aquatic vegetation and detritus. Adults typically emerge from these aquatic environments and frequent nearby meadows, forest edges, or open areas for foraging. Searching for naiads involves carefully examining the underwater plants and debris. To find adults, one should scan open, sunny spots close to water sources since common hawker adults prefer to hunt and mate in these areas. While observing, intentional movements around the vegetation and gentle sweeps with a net over the water's surface may yield sightings of the naiads and adults, respectively.
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When is the Best Time to Observe Common hawker
The suitable time to find common hawker is generally during the day, particularly on warm, sunny days when they are most active and likely to be seen flying or basking in the sun.
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What is the Best Weather to Observe Common hawker
The suitable weather for finding common hawker is warm, sunny, and calm, as they tend to be less active during cold, rainy, or windy conditions.
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How and Where Can You Find Common hawker at Different Life Stages
Egg Common hawker eggs are typically laid in or near aquatic environments. Look for them by carefully inspecting aquatic plants, the edges of ponds, or slow-moving streams where the female common hawker might deposit them.
Naiad Common hawker naiads are aquatic and can be found in ponds, marshes, or slow-flowing rivers. They often hide in debris or vegetation, so searching the substrate and among aquatic plants can yield sightings.
Adult During the emergence stage, common hawker transition from aquatic naiads to flying adults. This happens near water bodies. Scan the vegetation near the shores early in the morning to find emerging common hawker or their exuviae (empty naiadl skins) clinging to plants or stones.
Adult common hawker are strong fliers and can be found near water bodies or in open fields. To find adult common hawker, walk slowly along the edges of ponds, lakes, or rivers, and watch for them darting in the air catching prey or perching on vegetation, particularly during warm, sunny weather.
Are Common hawker harmful?
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Beneficial Effects of Common hawker
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Predators of Pests
Predators of Pests
Stage
Adults, Naiads
Diets
Mosquitoes, Aquatic Insects
Common hawker, both in its naiad and adult forms, actively hunts down prey in aquatic and terrestrial habitats, respectively. The naiads skillfully ambush or chase down mosquitoes and various aquatic insects in water, while the agile adult dragonflies capture these pests mid-flight, often consuming them on the wing. This predatory behavior not only sustains common hawker but also controls pest populations, contributing to the health of the ecosystem.
Common Questions People Also Ask
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