Overview

Distribution

occurs (regularly, as a native taxon) in multiple nations

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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Ecology

Habitat

Comments: Can occur in almost any kind of wooded habitat in which oaks are a substantial component. Becomes more confined to trails and openings when the canopy closes in in late spring, especially in its more forested habitats.

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Migration

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

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Associations

Flowering Plants Visited by Erynnis juvenalis in Illinois

Erynnis juvenalis Fabricius: Hesperiidae, Lepidoptera
(some observations are from Macior and Fothergill & Vaughn, otherwise observations are from Robertson; this skipper is Juvenal's Duskywing)

Asteraceae: Antennaria plantaginifolia [stam sn] (Rb), Bidens aristosa sn (Rb), Coreopsis palmata sn (Rb), Erigeron pulchellus sn (Rb), Taraxacum officinale sn (FV), Verbesina helianthoides sn (Rb); Boraginaceae: Lithospermum canescens sn (Rb), Mertensia virginica sn (Rb); Campanulaceae: Lobelia spicata sn (Rb); Caprifoliaceae: Viburnum dentatum sn (Rb), Viburnum prunifolium sn fq (Rb); Cornaceae: Cornus florida sn (Rb); Fabaceae: Astragalus crassicarpus trichocalyx sn np (Rb), Cercis canadensis sn np (Rb), Orbexilum onobrychis sn (Rb), Trifolium repens sn (Rb); Lamiaceae: Nepeta cataria sn (Rb), Pycnanthemum tenuifolium sn (Rb); Liliaceae: Erythronium albidum sn (Rb); Polemoniaceae: Polemonium reptans sn fq (Rb); Portulacaceae: Claytonia virginica sn (Rb); Ranunculaceae: Delphinium tricorne sn np (Mc), Ranunculus fascicularis sn (Rb), Ranunculus septentrionalis sn (Rb); Rosaceae: Fragaria virginiana sn (Rb), Malus coronaria sn (Rb), Prunus americana sn (Rb), Rubus allegheniensis sn (Rb), Rubus flagellaris sn (Rb); Rubiaceae: Cephalanthus occidentalis sn fq (Rb); Scrophulariaceae: Linaria vulgaris sn np (Rb); Staphyleaceae: Staphylea trifolia sn (Rb); Verbenaceae: Verbena stricta sn (Rb); Violaceae: Viola cucullata sn (Rb), Viola pedata sn (Rb), Viola pubescens sn (Rb)

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Erynnis juvenalis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 20
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Wikipedia

Erynnis juvenalis

The Juvenal's Duskywing (Erynnis juvenalis) is a butterfly of the Hesperiidae family.

Appearance and distribution [edit]

Underside view

Common in eastern North American oak woods from southern Manitoba to southern Quebec and Nova Scotia southward to Texas and Florida. This dark brown skipper is larger than most eastern Duskywings (wingspan: 30 to 37 mm). It has one brood in the spring (May to late June) in the east but two broods in spring and summer in the southwest. Both sexes have two to four white spots on the forewing. The females have greyer forewings and are more boldly marked. Both sexes have two spots near the upper margins of the ventral side of hindwings that are diagnostic of the species.[1][2] Larval foodplant: Oaks

Similar species [edit]

References and external links [edit]

  1. ^ Jim P. Brock and K. Kaufman. Kaufman Field Guide to Butterflies of North America, New York, NY:Houghton Mifflin, 2003.
  2. ^ Juvenal's Duskywing, Butterflies of Canada
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