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Once-married underwing

Once-married underwing

Catocala unijuga

A species of Underwings

Catocala unijuga, the once-married underwing, is a moth of the family Erebidae. The species was first described by Francis Walker in 1858. It is found in North America from Newfoundland west to south central British Columbia, south to Kentucky and Missouri in the east, Colorado and Utah in the west. The wingspan is 68–82 mm. Adults are on wing from July to September in one generation depending on the location. The larvae feed on Populus tremuloides, Populus nigra and Salix species.

General Info About Once-married underwing
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Attributes of Once-married underwing
Colors
Black
Gray
White
Orange
Habitat
moist forest
Adult Food Sources
Flower nectar, honeydew, wildflower nectar, garden flower nectar, sap from trees
Larva Food Source
Willow leaves, poplar leaves, aspen leaves, cottonwood leaves, birch leaves
Biting/stinging
Not reported
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
The Once-married underwing feeds on plants, usually without causing significant harm. However, it's important to take the situation seriously if their numbers begin to increase significantly.
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Siphoning mouthparts
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Species Status of Once-married underwing
Common and widespread
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Predators of Once-married underwing Larvae
Birds, reptiles, mammals, invertebrates
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Predators of Adult Once-married underwing
Bats, birds, spiders, other insects
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Interesting Facts About Once-married underwing
Adult once-married underwing have a remarkable ability to hear ultrasonic calls of bats, allowing them to evade nocturnal predators with impressive aerial acrobatics.
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Scientific Classification of Once-married underwing
Tips for Finding Once-married underwing
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Youth Habitat of Once-married underwing
Forests and Woodlands
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Habitat Preferences of Once-married underwing Through Different Life Stages
The eggs of once-married underwing are typically deposited on tree bark, while the larvae, or caterpillars, are likely found on the leaves of host plants such as poplar and willow. To find these caterpillars, search the foliage where they feed and grow. Meanwhile, pupae are often underground or in leaf litter near the base of the host plants, requiring careful sifting through debris. Adults are nocturnal and attracted to light, so they might be observed on lighted surfaces or nearby vegetation at night. Observing each growth and development stage of once-married underwing entails checking tree trunks, searching through leaf litter, and visiting light sources after dark.
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When is the Best Time to Observe Once-married underwing
The best time to find adult once-married underwing is at night when they are active and come to light, while larvae can be found during the day hiding on the undersides of host plants.
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What is the Best Weather to Observe Once-married underwing
Once-married underwing prefers temperate weather, avoiding extreme temperatures and heavy rain. Adult moths are most active on warm, calm nights with little moonlight.
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How and Where Can You Find Once-married underwing at Different Life Stages
Egg Eggs of once-married underwing are typically laid on the underside of leaves of host plants. To find them, inspect the host plants carefully, looking for small, round eggs.
Larva Larval once-married underwing are caterpillars that can be found on or near host plants. Search by examining leaves for signs of feeding, like holes or edges being eaten, and check both the tops and undersides of leaves.
Pupal Once-married underwing pupae are usually in concealed locations such as under the bark of trees, in leaf litter, or in soil at the base of the host plant. Gently dig or sift through these areas to find them.
Adult Adult once-married underwing are nocturnal and can be found near light sources at night. Set up a light trap with a white sheet to attract and observe them, or apply a sweet, fermented sugary bait on tree trunks to draw them in.
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Harmful Effects of Once-married underwing
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Hurt Plant

Once-married underwing larvae can cause defoliation, impacting photosynthesis. Severity varies with infestation levels, potentially leading to plant stress or death.

More Effects of Once-married underwing

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