Lycaena rubidus

Last updated

Ruddy copper
Ruddy Copper imported from iNaturalist photo 314981188 on 7 March 2024.jpg
Greenlee County, Arizona, 2023
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Lycaenidae
Genus: Lycaena
Species:
L. rubidus
Binomial name
Lycaena rubidus
(Behr, 1866) [1]
Synonyms
  • Chrysophanus rubidusBehr, 1866
  • Chalceria cupreusDyar, 1903
  • Lycaena cupreus
  • Lycaena siriusEdwards, 1871

Lycaena rubidus, the ruddy copper, is a butterfly of the family Lycaenidae. It is found in the western mountains of North America. [2] Adults lay their eggs on plants of the genus Rumex, which later become the larval food plants. This butterfly gets its name from the brightly colored wings of the males, which are important in sexual selection. [3] Its larvae exhibit mutualism with red ants, and are often raised in ant nests until they reach adulthood. [4] Adults are on wing from mid-July to early August. [2]

Contents

Distribution and habitat

Lycaena rubidus is found in only North America, spanning from British Columbia and California to South Dakota, [4] [5] which is similar to the Blue copper. It has one flight either from mid-June through July at low latitudes or from mid-July through August for high latitudes. [4]

L. rubidus tends to live in dry habitats, such as prairies and fields. It prefers temperate regions and is found in scrub forest, grassland, and desert biomes. [4]

Life cycle

Larvae

Caterpillars are brown with a red and yellow dorsal band. They have hunched backs, small legs, and their heads are obscured beneath the thorax. They emerge from their eggs under proper conditions and immediately begin feeding on their host plant. [4] Once they have eaten enough to survive the pupal stage, larvae are taken to a red ant nest to begin the chrysalis stage of their life cycle. [4]

L. rubidus larvae feed off on their host plants, which are polygonaceae from the genus Rumex. [5] [4] Specifically, they have been observed feeding on R. hymenosepalus , R. salicifolius, R. triangularis , and R. venosus . [1] [2] [6] [5] Larvae tend to feed on the terminal leaves, petals, and bracts of flowers. [4] Adult ruddy coppers feed on flower nectar. [4]

Pupa

The chrysalis of the L. rubidus changes in appearance over the course of the pupal stage. While it is originally camouflaged to avoid predation, the chrysalis becomes transparent by the end of the cycle, and the colors of the butterfly can be seen through the membrane. [4]

Imago

After mating, female L. rubidus spend the rest of their lives (about two weeks) searching for the correct food plants and laying eggs. [3] Males spend their adult lives competing for territory with other L. rubidus, but have no interest in males of other species. [3] Male territories range from 1–3 m. [3]

Oviposition

Females spend most of their adult lives laying eggs. [3] They use scent, as well as the receptors on the tips of their feet, abdomen, and antennae to ensure that they are laying their eggs on the correct plant. [4] Usually females will lay a single egg per host plant, but L. rubidus have also been observed dropping eggs rather than laying them on a host plant. [4] [7] They do this several dozen times per day. [3] Females are not territorial, and will not care for their young beyond laying them on a host plant that will be the larval food source once the eggs hatch. [4] [3]

Physiology

Wings

The ruddy copper has a small wingspan between 29 and 41mm. [4] As the common name suggests, the males have bright copper colored upperwings. The upperwings of females range from dark orange to a dull brown color. [6] [4] This sexual dimorphism is best explained by the ruddy copper's mating system; females are duller colored to avoid predators and blend into the environment, but they choose the brightest colored males to mate with. [8] Both sexes have pale underwings, and occasionally have small black spots on the hindwings. [4]

Color vision

The ruddy copper's eyes, like their wings, are sexually dimorphic, and females can see a broader range of color than males. [3] [5] Females need to be able to see the color of males, so that they can determine if he is conspecific, as well as the color of their host plants, so that they can lay their eggs in the proper location. [3] Males need to be able to see the color of other ruddy copper males, as they will only defend their territory against butterflies of the same species, but do not need to identify larval host plants. [3] Like most Lepidoptera, the ruddy copper has compound eyes with a dorsal and ventral region. [3] In most butterflies, the dorsal region of the eye looks at the sky during flight, while the ventral region observes the ground. [9] Thus, the two regions may be used to see different colors, depending on what colors are evolutionarily beneficial to see in the sky and on the ground. [9] The dorsal region on the female ruddy copper eye contains pigments P360, P437, and P568, which are sensitive to ultra-violet, blue, and red wavelengths respectively. [3] It is common for butterflies to be able to see UV and blue wavelengths with their dorsal region, as they can help detect predators from above. [9] Male dorsal regions, on the other hand, are dichromatic, containing P360 and P437, but lacking the red-absorbing P568 pigment. [3] The ventral eye of both sexes lacks the blue-sensitive P437 pigment, but contains P360, P500 (green), and P568, all of which are colors that are important for ruddy coppers to see on the ground. [3]

Mating

Male L. rubidus are selectively territorial, and will defend perches around streams and meadows where they will wait for females. [4] [6] [3] They can detect the females by pheromones released by females nearby. [8] Females will select their mate, judging a conspecific male by his wing color. [8] [3] The dorsal region of female L. rubidus eyes are trichromatic, containing P568, which allows them to judge the red-orange of the male's wing color. [3] Male eyes are dichromatic, and thus they cannot see the red color that females can see. [3]

Mutualism

The larvae and pupae of L. rubidus exhibit a mutualistic relationship with red ants. [4] The caterpillars secrete a fluid through glands in the body wall that has a high sugar concentration, which attracts the red ants. [4] The ants will carry the caterpillar to the nest, where they will defend it from predators in exchange for being able to feed on the fluid that the caterpillar secretes. [4] L. rubidus will stay in the ant nest until it completes pupation and emerges from the chrysalis as a butterfly. [4]

Conservation

L. rubidus is not a threatened species, however it is becoming more rare, specifically at the edges of their range. Habitat loss and fragmentation may cause a decrease in the species in the future. [4] It has a conservancy ranking of G-5. [10]

Subspecies

Related Research Articles

<span class="mw-page-title-main">Gulf fritillary</span> Sole species in brush-footed butterfly genus Agraulis

The Gulf fritillary or passion butterfly is a bright orange butterfly in the subfamily Heliconiinae of the family Nymphalidae. That subfamily was formerly set apart as a separate family, the Heliconiidae. The Heliconiinae are "longwing butterflies", which have long, narrow wings compared to other butterflies.

<i>Pieris rapae</i> Species of butterfly

Pieris rapae is a small- to medium-sized butterfly species of the whites-and-yellows family Pieridae. It is known in Europe as the small white, in North America as the cabbage white or cabbage butterfly, on several continents as the small cabbage white, and in New Zealand as the white butterfly. The butterfly is recognizable by its white color with small black dots on its wings, and it can be distinguished from P. brassicae by its larger size and the black band at the tip of its forewings.

<span class="mw-page-title-main">Common blue</span> Species of butterfly

The common blue butterfly or European common blue is a butterfly in the family Lycaenidae and subfamily Polyommatinae. The butterfly is found throughout the Palearctic and has been introduced to North America. Butterflies in the Polyommatinae are collectively called blues, from the coloring of the wings. Common blue males usually have wings that are blue above with a black-brown border and a white fringe. The females are usually brown above with a blue dusting and orange spots.

<span class="mw-page-title-main">Lycaenidae</span> Family of butterflies

Lycaenidae is the second-largest family of butterflies, with over 6,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 30% of the known butterfly species.

<i>Anthocharis midea</i> Species of butterfly in the family Pieridae

Anthocharis midea, the falcate orangetip, is a North American butterfly that was described in 1809 by Jacob Hübner. It belongs to the family Pieridae, which is the white and sulphurs. These butterflies are mostly seen in the eastern United States, and in Texas and Oklahoma. They eat the nectar of violets and mustards. They tend to live in open, wet woods along waterways, in open swamps, and less often in dry woods and ridgetops. This species is a true springtime butterfly, being on the wing from April to May.

<i>Eurytides marcellus</i> Species of butterfly

Eurytides marcellus, the zebra swallowtail, is a swallowtail butterfly native to the eastern United States and south-eastern Canada. It is the state butterfly of Tennessee. Its distinctive wing shape and long tails make it easy to identify, and its black-and-white-striped pattern is reminiscent of a zebra. The butterflies are closely associated with pawpaws, and are rarely found far from these trees. The green or black caterpillars feed on the leaves of various pawpaw species, while the adults feed on flower nectar and minerals from damp soil.

<span class="mw-page-title-main">Large copper</span> Species of butterfly

The large copper is a butterfly of the family Lycaenidae. L. dispar has been commonly arranged into three subspecies: L. dispar dispar, (single-brooded) which was commonly found in England, but is now extinct, L. d. batavus, (single-brooded) can be found in the Netherlands and has been reintroduced into the United Kingdom, and lastly, L. d. rutilus, (double-brooded) which is widespread across central and southern Europe. The latter has been declining in many European countries, due to habitat loss. Currently L. dispar is in severe decline in northwest Europe, but expanding in central and northern Europe.

<span class="mw-page-title-main">Cabbage moth</span> Species of moth

The cabbage moth is primarily known as a pest that is responsible for severe crop damage of a wide variety of plant species. The common name, cabbage moth, is a misnomer as the species feeds on many fruits, vegetables, and crops in the genus Brassica. Other notable host plants include tobacco, sunflower, and tomato, making this pest species particularly economically damaging.

<i>Battus philenor</i> Species of butterfly

Battus philenor, the pipevine swallowtail or blue swallowtail, is a swallowtail butterfly found in North America and Central America. This butterfly is black with iridescent-blue hindwings. They are found in many different habitats, but are most commonly found in forests. Caterpillars are often black or red, and feed on compatible plants of the genus Aristolochia. They are known for sequestering acids from the plants they feed on in order to defend themselves from predators by being poisonous when consumed. The adults feed on the nectar of a variety of flowers. Some species of Aristolochia are toxic to the larvae, typically tropical varieties. While enthusiasts have led citizen efforts to conserve pipevine swallowtails in their neighborhoods on the West coast, the butterfly has not been the subject of a formal program in conservation or protected in legislation. The butterfly is however of "Special Concern" in Michigan, which is on the Northern limit of its range.

<i>Polygonia interrogationis</i> Species of butterfly

Polygonia interrogationis, commonly called the question mark butterfly, is a North American nymphalid butterfly. It lives in wooded areas, city parks, generally in areas with a combination of trees and open space. The color and textured appearance of the underside of its wings combine to provide camouflage that resembles a dead leaf. The adult butterfly has a wingspan of 4.5–7.6 cm (1.8–3.0 in). Its flight period is from May to September. "The silver mark on the underside of the hindwing is broken into two parts, a curved line and a dot, creating a ?-shaped mark that gives the species its common name."

<span class="mw-page-title-main">Scarce copper</span> Species of butterfly

The scarce copper is a butterfly of the family Lycaenidae.

<span class="mw-page-title-main">Mission blue butterfly</span> Subspecies of butterfly

The Mission blue is a blue or lycaenid butterfly subspecies native to the San Francisco Bay Area of the United States. The butterfly has been declared as endangered by the US federal government. It is a subspecies of Boisduval's blue.

<span class="mw-page-title-main">Smith's blue butterfly</span> Subspecies of butterfly

Smith's blue butterfly, Euphilotes enoptes smithi, is a subspecies of butterfly in the family Lycaenidae. This federally listed endangered subspecies of Euphilotes enoptes occurs in fragmented populations along the Central Coast of California, primarily associated with sand dune habitat in one case with a dune-based Maritime Coast Range Ponderosa Pine forest in the Carbonera Creek watershed in Santa Cruz County. The range of E. e. smithi is from Monterey Bay south to Punta Gorda.

<i>Lycaena dorcas</i> Species of butterfly

Lycaena dorcas is a species of butterfly in the family Lycaenidae, the gossamer-winged butterflies. Its common names include dorcas copper and cinquefoil copper. The species was first described by William Kirby in 1837. It is native to North America. The species L. dospassosi was once included in L. dorcas.

<i>Lycaena epixanthe</i> Species of butterfly

Lycaena epixanthe, also known as the bog copper or cranberry-bog copper, is a North American species of butterfly in the family Lycaenidae. Adults like to sip drops of dew clinging to leaves and almost exclusively nectar on their host plant, cranberries. Because of this, bog coppers will spend their entire lives within the area of a single acid bog. Even though their flight is weak and close to the ground, bog coppers are hard to catch because of the habitat in which they live. Also, 85% of the bog coppers life span is spent in the egg. It is listed as a species of special concern in the US state of Connecticut.

<i>Lycaena feredayi</i> Species of butterfly

Lycaena feredayi, the glade copper, is a butterfly of the family Lycaenidae. It is endemic to New Zealand.

<i>Parnassius smintheus</i> Species of butterfly

Parnassius smintheus, the Rocky Mountain parnassian or Rocky Mountain apollo, is a high-altitude butterfly found in the Rocky Mountains throughout the United States and Canada. It is a member of the snow Apollo genus (Parnassius) of the swallowtail family (Papilionidae). The butterfly ranges in color from white to pale yellow-brown, with red and black markings that indicate to predators it is unpalatable.

<i>Lycaena heteronea</i> Species of butterfly

The blue copper, also known as Lycaena heteronea, is an American butterfly that belongs to the gossamer-winged family. The butterfly is named so because of the bright blue hue of the upper side of the males' wings. Females are brown on their upper side. Both sexes are white with black spots on the underside of the wings. Blue coppers are seen on the west coast of the United States and the southwest region of Canada, particularly British Columbia and Alberta. The males are often confused with Boisduval’s blue, another species of butterfly. Blue coppers prefer to live in areas where species of Eriogonum are found. Blue copper larvae sometimes form mutualistic associations with Formica francoeuri, an ant species.

<i>Eurybia elvina</i> Species of butterfly

Eurybia elvina, commonly known as the blind eurybia, is a Neotropical metalmark butterfly. Like many other riodinids, the caterpillars are myrmecophilous and have tentacle nectary organs that exude a fluid similar to that produced by the host plant Calathea ovandensis. This mutualistic relationship allows ants to harvest the exudate, and in return provide protection in the form of soil shelters for larvae. The larvae communicate with the ants by vibrations produced by the movement of its head. The species was described and given its binomial name by the German lepidopterist Hans Stichel in 1910.

References

  1. 1 2 Lycaena at Markku Savela's website on Lepidoptera
  2. 1 2 3 Ruddy Copper, Butterflies of Canada
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Bernard, G.D.; Remington, C.L. (1 April 1991). "Color vision in Lycaena butterflies: spectral tuning of receptor arrays in relation to behavioral ecology". Proceedings of the National Academy of Sciences. 88 (7): 2783–2787. doi: 10.1073/pnas.88.7.2783 . PMC   51323 . PMID   2011588.
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Watt, Loren (2001). "Lycaena rubidus ruddy copper". Animal Diversity Web. Retrieved October 19, 2017.
  5. 1 2 3 4 Pohl, Nelida; Van Wyk, Jennifer; Campbell, Diane (23 March 2011). "Butterflies show flower colour preferences but not constancy in foraging at four plant species". Ecological Entomology. 36 (3): 290–300. doi:10.1111/j.1365-2311.2011.01271.x. S2CID   84676752.
  6. 1 2 3 Warren, Andrew; Harrera, Alfonso. "Butterflies of Oregon their taxonomy, distribution, and biology" (PDF). Lepidoptera of North America. 6.
  7. Fiedler, Konrad; Schurtan, Klaus (November 1994). "Oviposition behaviour in Lycaena thetis Klug (Lepidoptera: Lycaenidae)". Nota Lepidopterologica. 17: 25–29. ISSN   0342-7536.
  8. 1 2 3 Fordyce, J.A.; Nice, C.C.; Forester, M.L.; Shapiro, A.M. (21 August 2002). "The significance of wing pattern diversity in the Lycaenidae: mate discrimination by two recently diverged species". Journal of Evolutionary Biology. 15 (5): 871–879. doi: 10.1046/j.1420-9101.2002.00432.x . S2CID   13047531.
  9. 1 2 3 Briscoe, Adriana (26 November 2007). "Reconstructing the ancestral butterfly eye: focus on the opsins". The Journal of Experimental Biology. 211 (11): 1805–1813. doi: 10.1242/jeb.013045 . PMID   18490396.
  10. "Ruddy Copper". Butterflies and Moths of North America. 2017.