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Curve-Lined Angle

Curve-Lined Angle

Digrammia continuata

A species of Digrammia

Digrammia continuata, the curve-lined angle, is a species of moth of the family Geometridae. It is found in North America, where it has been recorded from New Brunswick to Florida, west to California and north to Manitoba. The wingspan is about 22–24 mm. Adults are on wing from March to August in two generations per year. The larvae feed on Juniperus virginiana, Thuja occidentalis and Hesperocyparis guadalupensis. Full-grown larvae reach a length of about 29 mm. The species overwinters in the pupal stage in soil or amongst debris.

General Info About Curve-Lined Angle
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Attributes of Curve-Lined Angle
Colors
Black
Gray
White
Habitat
dry woodland; glade; forest edge
Adult Food Sources
Flower nectar, plant sap, fruit juice, honeydew secreted by aphids, water with dissolved sugars and salts
Larva Food Source
A variety of herbaceous plants, flowering plants, grasses, shrubs, trees (deciduous and coniferous, depending on the species)
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
Mouthparts Type
Siphoning mouthparts
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Species Status of Curve-Lined Angle
Common and widespread
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Distribution Area of Curve-Lined Angle
North America
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Life Cycle of Curve-Lined Angle
Egg The eggs of curve-Lined Angle are laid on suitable host plants. These eggs are often round or ovate, initially pale but may darken as development progresses. Larvae will emerge from these eggs, equipped for immediate feeding.
Larva The larvae of curve-Lined Angle exhibit rapid growth through various instars. They possess a voracious appetite, dramatically increasing in size. Their coloration may change for camouflage. Larvae focus solely on feeding to store energy for later stages.
Pupal Upon reaching a suitable size, the larva of curve-Lined Angle transforms into a pupa. Encased within a cocoon for protection, it undergoes a drastic transformation. The pupal stage is immobile and an intense period of development.
Adult Emerging from the pupa, the adult curve-Lined Angle’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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Interesting Facts About Curve-Lined Angle
Curve-Lined Angle can camouflage impeccably by mimicking the look of lichen on tree barks, a skillful adaptation for eluding predators.
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Scientific Classification of Curve-Lined Angle
Tips for Finding Curve-Lined Angle
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Youth Habitat of Curve-Lined Angle
Forests and Woodlands, Grasslands and Prairies
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Adult Habitat of Curve-Lined Angle
Forests and Woodlands, Grasslands and Prairies, Agricultural and Cultivated Areas
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How Can You Attract Curve-Lined Angle
For adult curve-Lined Angle, light traps at night or baiting with fermented sweet substances can be effective.
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What is the Best Weather to Observe Curve-Lined Angle
Calm, warm, and humid nights are ideal for observing adult curve-Lined Angle as they are more active in these conditions. For finding caterpillars or pupae, mild and dry weather during the day when the sun is out is preferable as this is when they are most likely to be feeding or moving about.
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How and Where Can You Find Curve-Lined Angle at Different Life Stages
Egg Curve-Lined Angle eggs are small and laid on host plants. To locate them, examine the leaves of known host plants, looking at both surfaces for small clusters or rows of eggs.
Larva Curve-Lined Angle caterpillars can be found on or near their food plants. Search for signs of feeding such as chewed leaves and frass (caterpillar droppings) to find these larvae during their active feeding daylight hours.
Pupal Curve-Lined Angle pupae are often hidden in the vegetation or in the soil. To find them, look for dropped caterpillars in the vicinity of food plants, or gently sift through leaf litter and topsoil near the base of the host plants.
Adult Adult curve-Lined Angle are nocturnal and can be lured with light traps. Set up a light source like a UV or mercury vapor lamp to draw them in after dark, and calmly approach to observe or capture them.
Are Curve-Lined Angle harmful?
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Harmful Effects of Curve-Lined Angle
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Forestry Pest

Larvae of curve-Lined Angle feed on the foliage of broad-leaved trees, causing mild to severe defoliation. Light infestations may only show minimal impact, but severe outbreaks can lead to significant foliage loss, weakening trees and possibly leading to their death. Humans might face economic impacts if timber or ornamental tree health is compromised.

More Effects of Curve-Lined Angle

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