Papilio polytes romulus
[Common Mormon]
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Caterpillar
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Pupa
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Online Reference: | Butterfly Circle | Butterflies of Singapore |

When I saw this lone caterpillar in April 2014 on my way to the Tree Top Walk, I did not know exactly which species of butterfly it belong though I know it was likely to be a member of the Swallowtail Family (Papilioninae). The caterpillar was found on a Pink Wampee (Clausena excavata), which belongs to the family Rutaceae. I went to the Butterfly Circle host plant checklist but the plant was not listed.

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The case was shelved until February 2015 when I saw a butterfly laying eggs on a Pink Wampee in a park. A total of 2 tiny yellowish eggs were deposited on two separate young leaves. I also managed to snap a blurry picture of the butterfly in flight. See my post on this sighting.

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As the leaves of Pink Wampee looked very similar to that of the India Curry Tree (Murraya koenigii), the identity of the host plant might be mixed up. Indeed, Murraya koenigii was listed in the Butterfly Circle host plant checklist in relation to this butterfly. However, I had yet to see a caterpillar of this butterfly on an India Curry Tree leaf. I did find a website (Butterfly Corner) that listed Pink Wampee as one the host plants of this butterfly.

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