18 June 2016

Life History of the Chestnut Angle v2.0

Life History of the Chestnut Angle (Odontoptilum angulatum angulatum)

Butterfly Biodata:
Genus: Odontoptilum  de Niceville, 1890
Species: angulatum C. Felder, 1862
Sub-species: angulatum C. Felder, 1862
Wingspan of Adult Butterfly: 35-40mm
Caterpillar Local Host Plants: Commersonia bartramia (Malvaceae, Common name: Brown Kurrajong, 山麻树), Talipariti tiliaceum (Malvaceae, Common name: Sea Hibiscus, 黄槿).

Physical Description of Adult Butterfly:
The forewing termen is sinuous, and the hindwing prominently stepped at vein 7. The upperside is chestnut-brown with a complex, cryptic pattern of white striae in the hindwing. The forewing has a dark sub-discal band, a crescentic hyaline spot in space 2, and a smaller spot above it near the base of space 3. In addition, two apical spots can be found in spaces 7 and 8. Hindwing has elongated tornal cilia. The male possesses a tuft of white hairs on the fore coxae, and the female has a thick anal tuft on the abdomen. The underside is predominantly whitish in the hindwing.

Field Observations of Butterfly Behaviour:
This species is rather rare in Singapore. The adults are usually found near its larval host plants, or when puddling on wet grounds and bird droppings. In Singapore, it may be found in urban wastelands where Commersonia bartramia grows, or in coastal wetlands where Talipariti tiliaceum (Sea Hibiscus) is common. They fly rapidly in bright sunshine in open spaces within forests or wastelands, and visit flowers for nectar. Other sighting locations include various parts of the nature reserves.