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Phyciodes tharos

(Arctic White)

Overview

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Interesting Facts

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Common Names

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Common Names in English:

Arctic White, Pearl Crescent, Pearl Cresent, Red Admiral

Description

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Family Nymphalidae

'The Nymphalidae are members of the Superfamily Papilionoidea, the true butterflies. Distributed worldwide, butterflies of this family are especially rich in the tropics. They are highly variable, and there are more species in this family than in any other. Adults vary in size from small to large, and their front legs are reduced, unable to be used for walking. Wing shape is also highly variable: some species have irregular margins (anglewings and commas), and others have long taillike projections (daggerwings). Browns, oranges, yellows, and blacks are frequent colors, while iridescent colors such as purples and blues are rare. Adults of some groups are the longest-lived butterflies, surviving 6-11 months. Adult feeding behavior depends on the species, where some groups primarily seek flower nectar while others only feed on sap flows , rotting fruit, dung, or animal carcasses. Males exhibit perching and patrolling behaviors when seeking mates. Egg-laying varies widely, as some species lay eggs in clustsers, others in columns, and others singly. Caterpillar appearance and behavior vary widely. Brushfoots overwinter as larvae or adults.

'[1]

Subfamily Nymphalinae

Brushfoots are the most prevalent members of the Family Nymphalinae. Distributed worldwide, this is a diverse group that contains several tribes , each with somewhat different structural and biological features. Adults of North American species are predominantly orange, brown, and black. Wing shape and mating systems are variable. Most checkerspots and crescentspots patrol for mates, while the remainder of groups exhibit either perching or perching and patrolling . Migration varies widely; some strong migrants are found in the lady butterflies, tortoiseshells, and anglewings, while other species are local in occurrence. Most species limit their host plants to a few species, but the Painted Lady has one of the widest host palettes of all butterflies. Eggs are laid singly or clustered in groups, and caterpillars be found feeding alone or communally. Brushfoots overwinter as young caterpillars or hibernating adults.[2]

Physical Description

Species Phyciodes tharos

Quite variable. Males usually have black antennal knobs. Upperside is orange with black borders ; postmedian and submarginal areas are crossed by fine black marks . Underside of hindwing has a dark marginal patch containing a light-colored crescent. Spring and fall broods (form marcia) have a gray mottled hindwing below. (ref. 105926)

Size/Age/Growth

Wing span : 1 1/4 - 1 3/4 inches (3.2 - 4.5 cm). (ref. 105926)

Habitat

Open spaces, meadows, fields , roadsides, streamsides.

Extremely widespread in most any sunny locations -- fields, wooded borders , yards , etc. Not associated with interior forested areas, but certainly one of the more frequently seen butterflies along woodland edges and powerline clearings. (ref. 104729)

Open areas such as pastures, road edges, vacant lots , fields, open pine woods . (ref. 105926)

Biology

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Diet

Foodplants are primarily asters. Ironically, because it is such a widespread species, the butterfly observer would never suspect what plants are the foodplants! Nectar plants are very widespread, but they are usually low-growing herbs, as opposed to tall herbs or large shrubs . (ref. 104729)

Caterpillar hosts: Several species of smooth-leaved true asters including Aster pilosus, A. texanus, and A. laevis. (ref. 105926)

Adult food: Nectar from a great variety of flowers including dogbane, swamp milkweed, shepherd's needle , asters, and winter cress. (ref. 105926)

Reproduction

Eggs are laid in clusters on leaves of asters. Larvae feed on aster foliage . Caterpillars are brown with yellow bands and many branching spines; last brood overwinters . Chrysalis is mottled gray, yellow and brown. There are usually several broods per season .

Behavior

Flight period: Many broods (four or five) that essentially overlap; there is a continuous presence in NC from mid-March to late November. The flight in the Coastal Plain and Piedmont begins in late March. (ref. 104729)

Taxonomy

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Notes

Name Status: Accepted Name .

Similar Species

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Phaon Crescent; Painted Crescent

Identification can be challenging at times, and Pearl Crescents can be confused with Mimic Crescent (P. incognitus), Phaon Crescent (P. phaon), and Silvery Checkerspot (Chlosyne nycteis).

Members of the genus Phyciodes

ZipcodeZoo has pages for 37 species and subspecies in this genus:

P. argentea (Chestnut Crescent) · P. batesii (Tawny Crescent) · P. batesii anasazi (Canyon Crescent) · P. batesii batesii (Tawny Crescent) · P. batesii lakota (Lakota Crescent) · P. batesii maconensis (Appalachian Crescent) · P. cocyta (Northern Crescent) · P. cocyta arenacolor (Steptoe Valley Checkerspot) · P. frisia (Cuban Crescent) · P. graphica (Graphic Crescent) · P. graphica vesta (Vesta Crescent) · P. incognitus (Mimic Crescent) · P. mylitta (Mylitta Crescent) · P. mylitta mexicana (Mylitta Crescent) · P. orseis (California Crescent) · P. orseis herlani (Orseis Crescent) · P. orseis orseis (Orseis Crescent) · P. pallescens (Mexican Crescent) · P. pallida (Pale Crescent) · P. pallida barnesi (Barnes' Crescent) · P. pallidus (Pallid Crescentspot) · P. phaon (Phaon Crescent) · P. picta (Painted Crescent) · P. picta canace (Painted Crescent) · P. pratensis (Field Crescent) · P. pulchella (Field Crescent) · P. pulchella camillus (Camillus Crescent) · P. pulchella pulchella (Field Crescent) · P. pulchella shoshoni (Field Crescent) · P. pulchella totchone (Field Crescent) · P. texana (Texan Crescent) · P. tharos (Arctic White) · P. tharos arctica (Pearl Crescent) · P. tharos riocolorado (Northern Pearl Crescent) · P. tharos tharos (Pearl Crescent) · P. tulcis (Pale-Banded Crescent) · P. vesta (Vesta Crescent)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 26, 2008:

Identifiers

Footnotes

  1. http://www.butterfliesandmoths.org/taxonomy?f=18&sci=Nymphalidae&com=Brush-footed Butterflies [back]
  2. http://bugguide.net/index.php?q=search&keys=Editha&search=Search [back]
Last Revised: 7/14/2012