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Colias eurytheme

(Alfalfa Butterfly)

Overview

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Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in English:

Alfalfa Butterfly, Alfalfa Caterpillar, Orange Sulphur, Orange Sulphur Butterfly

Common Names in French:

Coliade De La Luzerne

Common Names in German:

Amerikanischer Luzerneheufalter

Description

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Family Pieridae

'The Pieridae are members of the Superfamily Papilionoidea, the true butterflies. Worldwide in distribution, most species are found in the tropics. Adults have medium to small wings that are white, yellow, or orange, with some black or red, and many have hidden ultraviolet patterns that are used in courtship . Species with more than one generation usually have distinct seasonal variation in appearance . Adults of all species visit flowers for nectar, and adults of both sexes have three pairs of walking legs . Males patrol in search of receptive mates, and females lay columnar eggs on leaves, buds, and stems. The majority of caterpillars of North American whites and sulphurs feed on legumes or crucifers (members of the Mustard family ). Typically, temperate species overwinter in the pupal or larval stage , while tropical species overwinter as adults.

'[1]

Physical Description

Species Colias eurytheme

Quite variable. Upperside of male yellow with orange overlay, yellow veins, wide black border , and dark black cell spot. Female yellow or white with irregular black border surrounding light spots. Underside hindwing spot silver with 2 concentric dark rings , and a spot above it. (ref. 105574)

Color:

Quite variable. Upperside of male yellow with orange overlay, yellow veins, wide black border , and dark black cell spot. Female yellow or white with irregular black border surrounding light spots. Underside hindwing spot silver with 2 concentric dark rings , and a spot above it.

Size/Age/Growth

Wing span : 1 3/8 - 2 3/4 inches (3.5 - 7 cm).

Habitat

A wide variety of open sites, especially clover and alfalfa fields , mowed fields, vacant lots , meadows, road edges .

Open country, usually in cultivated areas. Most common in cultivated fields with alfalfa or other legumes; dozens may also be seen flying over fields and meadows. Also seen along woodland borders , gardens, etc. It is not found in the shade of forests . (ref. 104651)

Typically found at an altitude of 0 to 2,809 meters (0 to 9,216 feet).[2]

Biology

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Diet

Caterpillar hosts: Plants in the pea family (Fabaceae) including alfalfa (Medicago sativa), white clover (Trifolium repens), and white sweet clover (Melilotus alba). Adult food: Nectar from many kinds of flowers including dandelion, milkweeds, goldenrods, and asters.

Foodplants are legumes such as alfalfa (Medicago sativa) and clovers (Trifolium spp. ). The species nectars on a wide variety of plants, particularly in croplands with flowers -- alfalfa, red clover, white clover, etc. (ref. 104651)

Reproduction

Males patrol for receptive females, who lay eggs singly on top of host plant leaves. 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 .

Most feeding takes place at night. Young caterpillars chew holes in the tops of leaves, then later feed from the leaf tip . Older caterpillars eat half of the leaf before moving to the other half. Chrysalids overwinter.

Behavior

Flight: Two-three flights in the north from June-October, 4-5 in the south from March-November.

Flight period: Several broods, probably four or five; mainly from early March to late November, with scattered records in December, January, and February. The species apparently has no true gaps in the flight periods in the three provinces in NC. (ref. 104651)

Taxonomy

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Notes

Name Status: Accepted Name .

Last scrutiny: 08-Feb-2007

Similar Species

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Members of the genus Colias

ZipcodeZoo has pages for 56 species and subspecies in this genus:

C. alexandra (Queen Alexandra's Sulphur) · C. alexandra alexandra (Queen Alexandra's Sulphur) · C. alfacariensis (Berger's Clouded Yellow) · C. aurorina (Dawn Clouded Yellow Butterfly) · C. aurorina aurorina (Dawn Clouded Yellow Butterfly) · C. behri (Sierra Green Sulfur Butterfly) · C. behrii (Sierra Sulphur) · C. canadensis (Canadian Sulphur) · C. caucasica (Balkan Clouded Yellow) · C. cesonia (Dog Face) · C. chippewa (Heath Sulphur) · C. christina (Christina Sulphur) · C. christina christina (Christina Sulphur) · C. christina kluanensis (Kluane Sulphur) · C. chrysotheme (Lesser Clouded Yellow Butterfly) · C. crocea (Clouded Yellow Butterfly) · C. croceus (Clouded Yellow Butterfly) · C. erate (Eastern Pale Clouded Yellow) · C. eurytheme (Alfalfa Butterfly) · C. gigantea (Giant Sulphur) · C. gigantea gigantea (Giant Sulphur) · C. gigantea harroweri (Southern Giant Sulphur) · C. harfordii (Harford's Sulphur) · C. hecla (Hecla Sulphur) · C. hecla hecla (Artic Sulphur) · C. hecla hela (Hela Sulphur) · C. hyale (Pale Clouded Yellow) · C. interior (Pink-Edged Sulphur) · C. johanseni (Johansen's Sulphur) · C. meadii (Mead's Sulphur) · C. meadii elis (Elis Sulphur) · C. myrmidone (Danube Clouded Yellow Butterfly) · C. myrmidone myrmidone (Danube Clouded Yellow Butterfly) · C. nastes (Labrador Sulphur) · C. nastes aliaska (Alaskan Arctic Sulphur) · C. nastes moina (Manitoba Arctic Sulphur) · C. nastes nastes (Labrador Sulphur) · C. nastes streckeri (Strecker's Arctic Sulphur) · C. nastes werdandi (Nastes Sulphur) · C. occidentalis (Western Sulphur) · C. occidentalis chrysomelas (Golden Sulphur) · C. occidentalis pseudochristina (Western Sulphur) · C. palaeno (Palaeno Sulphur) · C. palaeno chippewa (Chippewa Sulphur) · C. palaeno palaeno (Moorland Clouded Yellow Butterfly) · C. pelidne (Pelidne Sulphur) · C. pelidne pelidne (Pelidne Sulphur) · C. pelidne skinneri (Skinner's Pelidne Sulphur) · C. phicomone (Mountain Clouded Yellow) · C. philodice (Clouded Sulfur) · C. philodice philodice (Clouded Sulphur) · C. philodice vitabunda (Lively Clouded Sulphur) · C. scudderi (Scudder's Sulphur) · C. scudderii (Scudder's Sulphur) · C. tyche (Booth's Sulphur) · C. tyche thula (Thula Sulphur)

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=15&sci=Pieridae&com=Whites and Sulphurs [back]
  2. Mean = 517.980 meters (1,699.409 feet), Standard Deviation = 594.470 based on 692 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/14/2012