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Walker's metalmark

Walker's metalmark

Apodemia walkeri

A species of Apodemia

Apodemia walkeri, or Walker's metalmark, is a butterfly in the family Riodinidae (metalmarks), in the superfamily Papilionoidea (butterflies and skippers). The species was described by Frederick DuCane Godman and Osbert Salvin in 1886. It is found from north-western Costa Rica north through Mexico. It is an occasional visitor to the lower Rio Grande Valley in southern Texas. The habitat consists of subtropical scrubs and forests. The wingspan is 20–25 mm. The upperside of the wings is grey with blurred white areas and orange marginal bands. The underside is white with orange marginal bands and small black marks. Adults are on wing in June and October in the northern part of its range and year-round further south. The MONA or Hodges number for Apodemia walkeri is 4406.

General Info About Walker's metalmark
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Attributes of Walker's metalmark
Colors
Brown
Black
Gray
White
Habitat
subtropical scrub; forest
Adult Food Sources
Nectar from flowers such as asteraceae, fabaceae, acanthaceae
Larva Food Source
Various specific host plants (e.g., eriogonum species)
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The Walker's metalmark is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Siphoning mouthparts
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Species Status of Walker's metalmark
Very rare; no protection required
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Distribution Area of Walker's metalmark
North-western Costa Rica, Mexico
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Life Cycle of Walker's metalmark
Egg In this initial stage, the eggs of walker's metalmark are deposited on host plants. The eggs are small, spherical, and typically exhibit a color that camouflages with the environment to protect them from predators.
Larva The larva of walker's metalmark emerges as a caterpillar with a primary focus on feeding to accumulate energy for further development. This stage is characterized by a segmented body, chewing mouthparts, and the lack of wings. Overtime, the larva will molt several times, increasing in size with each instar.
Pupal After the final larval stage, walker's metalmark enters the pupal stage, often within a cocoon. This stage is a transformational period where the larva metamorphoses into an adult. The pupa remains stationary, and externally, dramatic changes are not visible as the metamorphosis happens internally.
Adult Emerging from the pupa, the adult walker's metalmark’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. The coloration of the adult is often vibrant and plays a role in mating displays and predator avoidance.
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Interesting Facts About Walker's metalmark
Walker's metalmark can adjust its wing colors to better blend with the environment, which is an unusual trait amongst butterflies.
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Scientific Classification of Walker's metalmark
Tips for Finding Walker's metalmark
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Youth Habitat of Walker's metalmark
Deserts and Arid Regions
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Adult Habitat of Walker's metalmark
Deserts and Arid Regions, Grasslands and Prairies
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When is the Best Time to Observe Walker's metalmark
The best time to spot walker's metalmark is during their peak flight period which varies depending on the climate and geographic location, but typically falls in the warmer months when the adults are most active, usually mid to late spring through summer.
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What is the Best Weather to Observe Walker's metalmark
Optimal weather conditions for finding walker's metalmark include warm, sunny days with little to no wind, as most butterflies are less active and harder to spot during cold, rainy, or overly windy conditions.
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How and Where Can You Find Walker's metalmark at Different Life Stages
Egg Walker's metalmark eggs are often laid on the underside of host plant leaves. To find them, inspect the designated host plants, looking closely at the undersides of leaves for tiny, often round or ovate eggs.
Larva Walker's metalmark caterpillars can be found feeding on the host plants. To locate them, search for signs of feeding such as chewed leaves, and carefully check both the upper and lower sides of leaves on the host plant.
Pupal Walker's metalmark chrysalides may be attached to the host plant or nearby structures. To find them, look for pupae camouflaged in the environment, observing stems, tree trunks, or underside of leaves for any chrysalis-shaped structures.
Adult Walker's metalmark adults can be found near nectar sources such as flowers. To see them, visit flowering fields or gardens, especially those with preferred nectar plants, during the warmest part of the day when butterflies are most active.
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Harmful Effects of Walker's metalmark
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Hurt Plant

When walker's metalmark feeds on members of the Eriogonum genus, it chews on the plant tissues, particularly the leaves. This action results in foliage with irregular holes and missing margins, reducing the plant's ability to photosynthesize effectively and possibly stunting its growth. Over time, extensive feeding can weaken the plant, leaving it vulnerable to secondary infections.

More Effects of Walker's metalmark

Beneficial Effects of Walker's metalmark
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Pollinator
Pollinator
Attract Plant Feature
Color
Pollination Behavior Reason
Eat Pollen Or Nectar
Walker's metalmark is attracted to the bright colors of flowers, specifically those belonging to the Asteraceae family. This pollinator engages in pollination primarily as a byproduct of its search for pollen to consume as a food source.
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