Chrysiridia Madagascarensis Pair Origin:
Madagascar
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The Madagascan sunset moth, or simply sunset moth, (Chrysiridia rhipheus) is
a day-flying moth of the Uraniidae family. It is considered to be one of the
most impressive and beautiful Lepidoptera. Famous worldwide, it is featured in
most coffee table books on the Lepidoptera and is much sought after by
collectors. It is very colorful, though the iridescent parts of the wings do not
have pigment; rather the colors originate from optical interference. Adult
moths have a wingspan of 7–9 centimeters (3–3½ in).
The moth was considered to be a butterfly by Drury, who described it in
1773 and placed it in the genus Papilio. Jacob Hübner placed it in the moth
genus Chrysiridia in 1823. Later re-descriptions led to junior synonyms such as
Chrysiridia madagascariensis (Lesson, 1831).
At first the moth was thought to be from China or Bengal, but was later found to
be endemic to Madagascar. It is found throughout the year in most parts of the
island, with peak populations between March and August, and smallest numbers
between October and December. Females lay about 80 eggs under the leaves of
Omphalea spp. The caterpillars are whitish-yellow with black spots and red feet
and are covered in club-ended black setae. Silk spun from the mouth helps the
caterpillars hold onto smooth leaves and climb back to the plant when they fall.
After completing four instars, the caterpillars spin an open network cocoon. The
pupal stage lasts from 17 to 23 days. Chrysiridia rhipheus is the sole
specialist herbivore of the four species of Omphalea in Madagascar. Omphalea is
toxic: the toxins are sequestered by the feeding caterpillar and retained in the
pupal and adult stages. housands of these moths migrate between the eastern and
western ranges of their host plants.