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Ctenucha rubroscapus

Ctenucha rubroscapa

A species of Ctenucha

Ctenucha rubroscapus, the red-shouldered ctenucha moth, is a moth of the family Erebidae. It was described by Édouard Ménétries in 1857. It is found in western North America, where it is limited to low elevations west of the Cascade Mountains, south of Chehalis in Washington. The habitat consists of coastal grasslands adjacent to the ocean, as well as wet boggy meadows and wet prairie. The length of the forewings is 19–20 mm. Adults are brilliantly coloured black, blue and orange. Adults are on wing from late June to September in one generation per year. It is a day-flying species. The larvae feed on Poaceae and Cyperaceae species, including species of the genera Dactylis and Elymus. The larvae are black and densely covered with short tufts of white hairs.

General Info About Ctenucha rubroscapus
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Attributes of Ctenucha rubroscapus
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Vestigial
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Life Cycle of Ctenucha rubroscapus
Egg The egg stage begins life as a small, often spherical object laid on suitable plant leaves. These eggs are usually hard to distinguish from the surrounding environment, offering protection from predators.
Larva As larvae, ctenucha rubroscapus hatch with a primary goal of feeding to grow. They possess a worm-like appearance, molting several times, and their coloration tends to blend with the foliage to avoid predators.
Pupal Entering the pupal stage, ctenucha rubroscapus encapsulate within a cocoon or chrysalis. The creature's body undergoes significant transformation, quiet and immobile as tissues are reorganized into adult form.
Adult Emerging from the pupa, the adult ctenucha rubroscapus’s development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
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Predators of Ctenucha rubroscapus Larvae
Birds, spiders, mantises
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Predators of Adult Ctenucha rubroscapus
Birds, bats, spiders
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Interesting Facts About Ctenucha rubroscapus
Ctenucha rubroscapus larvae exhibit a fascinating defense mechanism by ejecting acid from glandular hairs when threatened.
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Scientific Classification of Ctenucha rubroscapus
Tips for Finding Ctenucha rubroscapus
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How Can You Attract Ctenucha rubroscapus
Caterpillars of ctenucha rubroscapus might be found by identifying and searching their host plants.
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Habitat Preferences of Ctenucha rubroscapus Through Different Life Stages
The eggs of ctenucha rubroscapus are typically laid on the underside of host plant leaves. As for the larvae, they can often be found on or near their food plants, usually a variety of grasses or low-lying shrubs. After pupation, the chrysalides of ctenucha rubroscapus are usually hidden in ground litter or soil near the food source. When searching for these different development stages, you would meticulously check under leaves, sift through plant litter, and gently dig around the base of food plants without disturbing the ecosystem. The adult ctenucha rubroscapus are generally found in open fields, meadows, or forest edges, where they feed on the nectar of various flowering plants, most active during daylight hours.
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When is the Best Time to Observe Ctenucha rubroscapus
The best time to find adult ctenucha rubroscapus is usually at dusk or during the night when they are most active, while larvae can be found during the day on their host plants.
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What is the Best Weather to Observe Ctenucha rubroscapus
Warm and damp conditions are often more suitable for finding adult ctenucha rubroscapus as they are more active, and dry conditions during the day are better for finding larvae to avoid disturbing wet foliage.
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How and Where Can You Find Ctenucha rubroscapus at Different Life Stages
Egg Ctenucha rubroscapus eggs are often laid on the undersides of leaves of the host plant. To find them, inspect leaves of known host plants in the area carefully for small clusters or rows of eggs.
Larva Larval ctenucha rubroscapus may be found on or near their host plants. Look for chewed leaves or frass (caterpillar droppings) as an indicator of their presence, and then search the plant more thoroughly.
Pupal Ctenucha rubroscapus pupae are typically found in concealed locations near the larval host plants. Search for them in leaf litter, soil, or crevices where they may be overwintering or transforming.
Adult Adult ctenucha rubroscapus can be observed feeding at flowers or bait stations at dusk. Light traps can also be an effective way to attract and observe adult ctenucha rubroscapus at night.
Are Ctenucha rubroscapus harmful?
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Harmful Effects of Ctenucha rubroscapus
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Hurt Plant

Ctenucha rubroscapus larvae can cause a spectrum of damage to plants, from mild to severe, typically chewing on the leaves without preference for plant type. The extent of damage is influenced by the larvae population density.

More Effects of Ctenucha rubroscapus

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