Teinopalpus imperialis

Kaiser-i-Hind
Teinopalpus imperialis, ventral side of male
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Papilionidae
Genus: Teinopalpus
Species: T. imperialis
Binomial name
Teinopalpus imperialis
Hope, 1843

The Kaiser-i-Hind (Teinopalpus imperialis) is a rare species of swallowtail butterfly found from Nepal and north India east to north Vietnam. The common name literally means "Emperor of India". The Kaiser-i-hind is much sought after by butterfly collectors for its beauty and rarity. The green iridiscence of the wings has been found to be due to three-dimensional photonic structure of the scales and is the subject of much research.[2]

Description

See glossary for terms used

The Kaiser-i-hind, like the Bhutan Glory is unmistakable and cannot be confused with any other butterfly. A predominantly green swallowtail, the male has a bright

The following descriptions are from Bingham, C. T (1907) The Fauna of British India, Including Ceylon and Burma. Butterflies Volume 2.

Male

Teinopalpus imperialis male

Upperside black, densely irrorated with green scales. Forewing: an outwardly oblique, slightly concave subbasal band and a narrow terminal edging jet-black due to the ground-colour there being devoid of the green scaling; beyond the subbasal band the irroration of scales a much brighter green, especially along the outer edge of the subbasal band itself; but along obscure, broad and convergent discal and postdiscal transverse bands and along a subterminal much narrower band, the green scaling thins out and the black ground-colour of the wing shows through; in some specimens, owing to the transparency of the wings, the rich ochraceous-brown colour of the underside gives the black on these bands a reddish tint. Hind wing: basal area margined outwardly by a narrow irregularly sinuous band devoid of green scaling, succeeded by an upper discal bright chrome-yellow patch that spreads from base of interspace 3 across the apex of the cell and bases of interspaces 4 and 5 to the costa; this patch is bluntly angulated outwards in interspace 5, stained with orange anteriorly and bordered outwardly by black which is widest above; below the patch a white line extends to the dorsum; the postdiscal area is deep dark green, margined inwardly by diffuse dark grey and followed outwardly by a subterminal series of lunular markings, the tornal and upper two or three of which are yellow, the rest bright green; tail tipped with yellow. Underside: basal area of both fore and hind wings densely covered with green scales. Forewing: terminal two-thirds rich ochraceous brown, the green of the basal area bordered by black; discal and postdiscal bands also black, widened and diffusely coalescent posteriorly; an incomplete, very slender subterminal black line and broader black terminal edging, neither of which reaches to the apex. Hindwing much as on the upperside, but the yellow marking broader. Antennae dark red; head, thorax and abdomen black, covered somewhat densely with green hairs and scales.

Female

Teinopalpus imperialis female

Much larger, differs also in coloration and markings as follows: Upperside, forewings: the irroration of green scales on the terminal two-thirds restricted to a sub-terminal moderately broad band diffuse along its inner edge, and a medial somewhat ill-defined similar band that is bordered both on the inner and outer sides by diffuse dusky black; this is succeeded by two broad diffuse transverse dark grey bands, the outer of the two edged on its outer side narrowly with black, followed by a subterminal green band and terminal velvety-black margin. Hindwing: the upper discal yellow patch so conspicuous in the male, replaced by a very much larger dark grey patch, below which comparatively narrow markings of yellow extend up to the dorsum; a postdiscal sinuous lunular narrow black band and a subterminal series of green lunules as in the male, but the apical lunule dark grey, not yellow; the tail-like extensions of the termen at the apices of veins 3 to 6 are black shaded with green, those at the apices of veins 4 and 6 tipped, the former with yellow the latter with greenish-white. Underside similar to the underside in the male, but on both fore and hind wing the areas coloured with rich ochraceous and yellow are grey, with the exception of a well-marked moderately broad subterminal band on the forewing which is of a dull ochraceous colour; on the hindwing the grey discal area extends right up to the apical lunule of the subterminal series. Antennae, head, thorax and abdomen as in the male.

Expanse: 90–127 mm

The larva of this magnificent butterfly, according to Mr. Knyvett, feeds on Daphne nipalensis, but so far as I know, no description of it has been published. I am quite unable to separate the Sikkim form of this insect, even as a race. The points of difference between it and the Assam form are extremely variable, and the most prominent of these, viz. the paler tint of the grey area on the upperside of the hind wing in the female, is perhaps the most variable of all the characters. An Assam specimen of the female in the collection of the British Museum is far and away paler than any Sikkim specimen I have seen. Mr. Elwes says that in Sikkim this insect is only found in the forest region from about 6,000 to 10,000 feet (1,800 to 3,000 m) elevation, and that "it is most difficult to capture on account of its remarkably strong, rapid and dashing flight, and its habit of resting on high trees from which it flies only during a few hours of the morning" (Elwes, Trans. Ent. Soc. 1888, p. 421). The females are much scarcer than the males. I once saw a female on the wing and rather low down, in a clearing on the hill above the Rungarun Forest bungalow near Darjeeling. According to Col. Swinhoe, T. imperialis is common in the Khasia hills in Assam.

Distribution

The butterfly is found small pockets in Nepal, Bhutan and along the Eastern Himalayas in India (West Bengal, Meghalaya, Assam, Sikkim and Manipur). It is also found in northern Myanmar, northern Vietnam and in the Sichuan province of China. Mostly seen above 6,000 feet (1,800 m).

Status

The Kaiser-i-Hind is a local and rare butterfly which is protected by Indian and Nepalese law. Protection enforcement in these countries not being effective, it is hunted and collectors pay heavy prices.[3]:19

The two species of Kaiser-i-hind were listed in CITES Appendix II from 1987 onwards.[3]:5[4]

The Kaiser-i-hind would be a keystone species for conservation of high-altitude forest. Conservation in the Indian Union is complicated by the fact that most of the responsibility for conservation action runs at the state (province) level and not at the national level. There is a need for collecting more data in the habitat area and surrounding areas such as the adjoining mountain regions of China where the species is likely to occur.[3]:19

Habitat

The Kaiser-i-hind is a high altitude forest species[3]:19 which occurs at medium and higher elevations in the Himalayas from 6,000 to 10,000 feet (1,800 to 3,000 m) in well-wooded terrain. In the northeast of India, much of its forest habitat is degraded by jhoom cultivation; the butterfly is rarely found in the degraded patches.[3]:19

Habits

Very fast and strong flight. Flies at tree-top level until it chooses to descend if there is strong morning sunlight. When overcast, males are known to descend and sit on low vegetation, where it's disruptive, dull underside colouration makes it difficult to distinguish. Will remain so still that they have even been caught by hand in such circumstances. Females are known to fly in overcast and rainy weather also. Males visit damp patches and also suck moisture from leaves. Females rarely visit flowers or damp patches. Can be attracted by baiting. Often found on forest clearings and open spaces flanked by forests on hills and mountains. These are mostly males, who establish territories and aggressively drive away other intruding males, and stopping virgin females in search of mates.

Lifecycle

Flies in Sikkim in April and May and later in Manipur from May to July. Probably have two broods. The larvae feed on Magnolia campbellii (Magnoliaceae).

Eggs: Smooth, spherical, pale purplish red. Laid on underside of leaves.

Larva: Spindle shaped, green larva with broad heads and tapering tails. The larva has minute spines on the head and hair-like long spines on the segments.

Pupa: Resembles that of Graphium species. It has a smooth head and prominent dorsal horn. It has a green mesothorax and broad yellow dorsal zones on the abdomen.

Research

The iridescent green scaling on the wings of the Kaiser-i-hind are the subject of much research.[2][5][6] The three-dimensional photonic structure has been examined by transmission electron tomography and computer modelling to reveal naturally occurring "chiral tetrahedral repeating units packed in a triclinic lattice" (Argyros et al., 2001), the cause of the iridescence.[2]

See also

References

  1. ↑ Gimenez Dixon, M. 1996. Teinopalpus imperialis. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. [www.iucnredlist.org]. Downloaded on 25 June 2007.
  2. 1 2 3 Argyros, A.; Manos, S.; Large, M.C.J.; McKenzie, D.R.; Cox, G.C., and Dwarte, D.M. (2002). "Electron tomography and computer visualisation of a three-dimensional ‘photonic’ crystal in a butterfly wing-scale". Micron (Elsevier Science Ltd.) 33 (5): 483–487. doi:10.1016/S0968-4328(01)00044-0. PMID 11976036. Retrieved 28 October 2010.
  3. 1 2 3 4 5 New, T. R.; Collins, N. Mark (1991). Swallowtail butterflies: an action plan for their conservation. IUCN/SSC Species Action Plans Series (illustrated ed.). Switzerland: IUCN SSC Lepidoptera Specialist Group. p. 36. ISBN 978-2-8317-0061-8.
  4. ↑ "Appendices I, II and III to CITES". Convention on International Trade on Endangered Species. As of 14 Oct 2010. Retrieved 23 September 2010. Check date values in: |date= (help). No mention found in the document.
  5. ↑ Ghiradella, Helen (1991). "Light and color on the wing: structural colors in butterflies and moths". Applied Optics 30 (24): 3492–3500. doi:10.1364/AO.30.003492. PMID 20706416.
  6. ↑ Michielsen, K.; Stavenga, D.G. (2008). "Gyroid cuticular structures in butterfly wing scales: biological photonic crystals". Journal of the Royal Society Interface 5 (18): 85–94. doi:10.1098/rsif.2007.1065. PMC 2709202. PMID 17567555.

Other sources

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