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Splayed deer fly

Splayed deer fly

Chrysops caecutiens

A species of Deer flies, Also known as Gemeine blindbremse, Blinding gad fly

Chrysops caecutiens reaches a length of about 8.5–10 millimetres (0.33–0.39 in). The mesonotum and the scutellum are glossy black with yellow-brown hairs. The compound eyes have red and green reflections, with dark spots. The transparent wings have dark brown patches, located at the top and at the centre of each wing. The abdomen shows distinct black inverted-V marking (hence the common name of "splayed" deer fly). The legs are black, included the tibiae on the middle pair of legs. They are active from May to September.

Bite Humans
Bite Humans
Bite Animals
Bite Animals
Cause Disease in Humans
Pathogenic
Does Splayed deer fly consume human blood?
Hematophagy
General Info About Splayed deer fly
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Attributes of Splayed deer fly
Colors
Brown
Black
Green
Yellow
Habitat
These horseflies preferably live in shaded marshlands and in damp woodlands.
Adult Food Sources
Plant nectar, blood meal from mammals
Larva Food Source
Small insects, organic debris, tiny invertebrates
Biting/stinging
The Splayed deer fly may bite humans actively. Please stay away from it.
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
Mouthparts Type
Cutting-sponging mouthparts
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Distribution Area of Splayed deer fly
This species is present in most of Europe, the eastern Palearctic realm, and the Near East.
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Predators of Adult Splayed deer fly
Birds, bats, various species of spiders, predaceous insects such as robber flies
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Interesting Facts About Splayed deer fly
Female splayed deer fly are unique blood feeders, using blade-like mouthparts to slice skin and sponge up the pooling blood.
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Scientific Classification of Splayed deer fly
Class
Bugs
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Order
Flies
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Tips for Finding Splayed deer fly
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Youth Habitat of Splayed deer fly
Forests and Woodlands, Grasslands and Prairies, Freshwater Habitats, Wetlands
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Habitat Preferences of Splayed deer fly Through Different Life Stages
The eggs of splayed deer fly are typically laid on vegetation near water bodies. Larvae then develop in moist soil or mud, often in marshy areas or along the banks of rivers and streams, where they feed on organic matter. Pupae are usually found in drier areas near the larval habitat, buried in soil or under debris. When searching for adults, look for them in areas with plenty of flowering plants, as they feed on nectar, or near livestock and humans, which they may bite for a blood meal.
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When is the Best Time to Observe Splayed deer fly
The best time to find adult splayed deer fly is during warm, sunny days since they are most active in such conditions. Larval stages might be found throughout the year, often in wet or muddy habitats.
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What is the Best Weather to Observe Splayed deer fly
Sunny and calm weather conditions are ideal for finding adult splayed deer fly, as wind can inhibit their flight patterns, and they are less active on cloudy or rainy days.
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How and Where Can You Find Splayed deer fly at Different Life Stages
Larva Splayed deer fly larvae are typically found in wet soil or mud near water bodies. Search for them by carefully sifting through mud, near ponds, or streams.
Pupal Splayed deer fly pupae are often located near the same habitats as the larval stage but may be closer to the surface or in a transitional area between aquatic and terrestrial zones. Look for them on or just beneath the soil surface.
Adult Splayed deer fly adults can be found in open areas such as fields and along the edges of forests. They may be seen flying or resting on vegetation. To find them, walk slowly through these areas, paying close attention to flowers and sunlit spots where they may be feeding or resting.
Are Splayed deer fly harmful?
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Harmful Effects of Splayed deer fly
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Bite Humans

Splayed deer fly does not typically exhibit biting behavior towards humans as it mainly feeds on the blood of other animals. Human encounters resulting in bites are generally accidental, not a characteristic feeding behavior. Bites from splayed deer fly, if they occur, would be incidental with mild consequences for the person involved.

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Bite Animals

The species splayed deer fly typically bites during the adult stage as a method of obtaining blood meals essential for reproduction. They locate their targets by detecting carbon dioxide, movement, and warmth, and usually attack during daylight.

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Cause Disease in Humans

Splayed deer fly, a biting fly, can transmit diseases like tularemia, leading to fever, skin ulcers, and lymph gland swelling. The bite, initially painful, could cause secondary infections. In immunocompromised individuals, the effects might be severe, potentially resulting in long-term health issues.

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