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Butterfly Wing Scale Digital Image Gallery
Redspot Sawtooth Butterfly
The common name of the redspot sawtooth butterfly spawned from the markings on its wings, which consist of a large red spot and a sawtooth pattern created by oblong yellow and white patches of wing scales. Although its appearance closely resembles the poisonous painted jezebel butterfly, the redspot sawtooth is not considered a mimic.
Classified by entomologists as Prioneris philonome, the redspot sawtooth butterfly is a member of the family Pieridae, which contains the white, sulfur, yellow, and orange tip butterflies. Three recognized subspecies of redspot sawtooth butterflies exist throughout its range of India and Southeast Asia. Essentially a forest species, the redspot sawtooth frequents open spaces along streams and is often observed drinking at seepages in mixed butterfly groups. The beautiful lepidopteran may also be seen sipping nectar from brightly colored flowers.
The other life stages of the redspot sawtooth butterfly are not as ostentatious as the adult stage. The slender redspot sawtooth eggs hatch into many small, hungry caterpillars that usually feed on the leaves of the plants that are the source of capers. As pierids, the larvae live in the open, and rely on camouflage for protection. The caterpillars are either green or reddish brown and are covered in fine hair, rather than spiky fleshy projections. The simple caterpillars appear rather plain when contrasted with lepidopteran larvae of other families, and the chrysalides, which are often green in color, are equally unpretentious.
In Vietnam, Cambodia, and Laos, the use of bombs, chemical defoliants, and napalm during the Vietnam War devastated much of the redspot sawtooth’s forest habitat. Localized over-collecting coupled with continual destruction of the tropical rainforests of Southeast Asia and the Malay Archipelago has also stressed populations of the species. The development of ecologically based tourism and increasing demand for specimens by collectors, however, may result in a brighter future for the redspot sawtooth and other imperiled butterflies. Conservation measures and habitat restoration may ensue as the concept of butterflies as valuable and renewable resources becomes increasingly significant in the economies of their native countries.
Redspot Sawtooth Butterfly Images in Brightfield Illumination
Wing Scales and Fur - This brightfield image is filled with copious rows of redspot sawtooth scales. A few delicate strands of the fur that coats the wing wisp across their surfaces.
Redspot Sawtooth Butterfly Images in Darkfield Illumination
Wing Scale Interference Patterns - The redspot sawtooth wing scales in this darkfield image appear heavily textured, a characteristic caused by interference in the illumination. A vein runs down the right side of this photomicrograph, which adds additional interest to the image.
Edge of Wing - Another beautiful darkfield image of the scales and fur that line the edge of a redspot sawtooth wing is displayed here. The strands of fur appear very fine and straight, like a pin.
Redspot Sawtooth Butterfly Images in Oblique Illumination
Wing Scale Array - This high magnification redspot sawtooth wing scale image was captured in oblique illumination. Several well arranged rows of scales are displayed and the pair of v-shaped notches in each scale can clearly be observed.
Redspot Sawtooth Butterfly Images in Reflected Light
White Wing Scales - Piles of snowy white wing scales are displayed in this reflected light image. The shimmery effect on their surfaces gives this photomicrograph an otherworldly appearance
Contributing Authors
Cynthia D. Kelly, Shannon H. Neaves, Laurence D. Zuckerman, and Michael W. Davidson - National High Magnetic Field Laboratory, 1800 East Paul Dirac Dr., The Florida State University, Tallahassee, Florida, 32310.
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