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Fern

Fern

Horisme tersata

A species of Horisme

Horisme tersata, the fern, is a moth of the family Geometridae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775 and it can be found in the Palearctic realm. The wingspan is 31–36 mm. The length of the forewings is 14–18 mm. The moths fly in one or two generations from May to August. The larvae feed on Clematis vitalba.

General Info About Fern
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Attributes of Fern
Colors
Brown
Black
White
Habitat
Open woodland on calcareou soi; hedgerow; garden; mixed forest; drought-tolerant slope; deciduous forest
Adult Food Sources
Nectar from flowering plants like buddleia, thistle, lavender, honeysuckle, ivy
Larva Food Source
Brambles, birch leaves, willow leaves, hawthorn, rowan
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Phytophagous
Not reported
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Siphoning mouthparts
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Species Status of Fern
Common
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Distribution Area of Fern
Britain
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Predators of Adult Fern
Bats, birds, rodents, spiders, insectivorous mammals
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Interesting Facts About Fern
The caterpillar of fern camouflages as a twig, not just in appearance but also by remaining motionless during daylight, deceiving both predators and human observers.
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Scientific Classification of Fern
Tips for Finding Fern
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Youth Habitat of Fern
Forests and Woodlands
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Habitat Preferences of Fern Through Different Life Stages
The eggs of fern are often placed on the host plant leaves or in crevices of the bark, where the female ensures their protection. Caterpillars are commonly found on the underside of leaves or along branches, camouflaging perfectly with the plant. For pupation, fern caterpillars typically choose a concealed spot among leaf litter or in the soil. They sometimes also use the crevices of bark. To observe these insects, one would look for eggs on suitable host plants, inspect the undersides of leaves and branches for caterpillars, and sift through leaf litter or soil for pupae, paying attention to any potential hiding places.
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When is the Best Time to Observe Fern
The best time to find adult fern is usually at night since many moths are nocturnal. However, caterpillars can often be found during the daytime when they are active on their host plants.
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What is the Best Weather to Observe Fern
Calm, warm, and humid nights are typically the best conditions to find adult fern moths. As for the caterpillar stage, mild to warm weather that supports the growth of their host plants is ideal.
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How and Where Can You Find Fern at Different Life Stages
Egg Fern eggs are typically laid on the underside of host plant leaves. To find them, examine the leaves of known food plants paying close attention to their undersides.
Larva Fern caterpillars are known to mimic twigs and can be found on or near their host plants. Look for them by carefully inspecting branches and twigs for caterpillars that resemble small sticks or stems.
Pupal Fern pupae may be found in leaf litter or attached to twigs or tree bark. Searching around the base of host plants or carefully inspecting potential pupation sites can yield results.
Adult Adult fern moths can be found by setting up light traps after dusk or by using sweet bait stations. They are attracted to light and sweet scents and can be observed resting on vegetation or near the light sources.
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Common Questions People Also Ask
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