Zizina labradus

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Common grass blue
Zizina labradus-Butterfly-on-Rose SC,-EG-Vic,-23.2.2008.jpg
This specimen, perched on a rose, is approximately 10 mm in size
Common Grass Blue Butterfly.jpg
At Cape Hillsborough National Park, Australia
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Lycaenidae
Genus: Zizina
Species:
Z. labradus
Binomial name
Zizina labradus
(Godart, [1824]) [1] [2]
Subspecies
  • Z. l. labdalon
  • Z. l. labradus

Zizina labradus, the common grass blue, grass blue, [3] or clover blue, [4] is a small Australian butterfly of the family Lycaenidae.

Contents

Description

Adult feeding from Cotoneaster sp. Common grass blue.jpg
Adult feeding from Cotoneaster sp.

Adults are purplish blue on the upper wing surface with a black body and black or brown wing margins. These margins are larger on the female than the male. [5] The lower wing surface is brown to pale brownish grey with a pattern of fawn bands and spots, [4] [6] with the body covered in white or grey hairs. The wingspans of females are slightly larger than males, females having a wingspan of 23 mm and males 20 mm. [5] Common grass blues have a weak, fluttering flight and so usually fly near ground level close to a food source. [5]

Eggs are white or pale blue and have a mandarin shape[ clarification needed ] with a pitted surface. [5] Caterpillars reach about 7 mm in length, and their appearance is primarily green with a yellow stripe at the sides and a darker green stripe on the back, and brown or black head usually obscured under the thorax. [6] In captivity, fed on an artificial diet, larvae come in highly variable colours, ranging from white through red to dark purple. [5] Pupa are 10 mm long with erect hairs. Colouration varies, ranging from pink, greyish or greenish cream and contains mottled dark spots. [5]

Distribution

The subspecies Zizina labradus labradus is found over most of continental Australia, as well as on Lord Howe Island, [6] Norfolk Island, and Christmas Island, [7] while the subspecies Zizina labradus labdalon is restricted mainly to Cape York Peninsula. [6] The common grass blue is often misidentified as the lesser grass blue, Zizina otis . [6]

Zizina labradus labradus, as its name suggests, is very common and can be found in suburban gardens, particularly perching in grass; lawns and fields. [5]

Growth

Single eggs are laid which can hatch in a matter of days. [6] The eggs are laid on leaves, stems, flower buds and young pods of food plants, chiefly legumes of the family Fabaceae such as beans, clover, and various native species [5] [6] including Cullen australasicum (Tall Scurf-pea); Hardenbergia violacea (Native Lilac); Kennedia prostrata (Running Postman); and Lotus australis (Austral Trefoil). [8] Newly hatched larvae eat small holes from young leaves or flower buds, and later feed mainly inside flowers. [5] The larvae are considered a minor pest and will feed on leguminous plants such as garden beans by eating a small hole into the pods and then devouring the soft seeds within. [5] In captivity when food is scarce the larger larvae will cannibalize smaller ones. [5]

The larvae are typically attended by ants of the genera Paratrechina , Rhytidoponera , and Tapinoma . [4]

The pupa attaches to the lower leaf surface of the food plants with anal hooks and a central girdle. [5] [6]

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References

  1. dos Passos, Cyril F. (1958). "The dates and authorships of the names proposed in Volume 9 of Encyclopédie Méthodique by Godart and Latreille, 1819–[1824]" (PDF). The Lepidopterists' News. 12 (3–4): 119–120.
  2. "Butterflies and Moths of the World: Generic Names and their Type-species". Natural History Museum, London, Official Website. The Natural History Museum, London. 2007. Retrieved 2008-07-31.
  3. "Bioinformatics: Victorian Butterfly Images". Museum Victoria Official Website. Museum Victoria, Australia. n.d. Archived from the original on June 26, 2007. Retrieved 2008-07-30.
  4. 1 2 3 "Zizina labradus". Discover nature. James Cook University. 2008-02-04. Retrieved 2008-07-30.
  5. 1 2 3 4 5 6 7 8 9 10 11 12 Michael F. Braby (2000). Butterflies of Australia, Their Identification, Biology and Distribution, Vol. 2. pp. 837–838. ISBN   0-643-06493-1.
  6. 1 2 3 4 5 6 7 8 "Zizina labradus". UTS Official Website. University of Technology, Sydney. 2008-06-18. Archived from the original on 2008-07-25. Retrieved 2008-07-30.
  7. "Scientific Names: Zizina labradus ssp. labradus (Godart)". CSIRO Official Website (Entomology). CSIRO. 2004-09-19. Retrieved 2008-07-31.
  8. "Grass-blue | Butterfly Conservation SA Inc" . Retrieved 2023-02-06.