Vol 7 No 2
Aug 2000
The Truth
about Grass
Butterfly-Plant Relationships
List of butterflies
(1999-2000)
Beauty to Behold how animals see
More about the eyes of animals
Nesting Birds
at Sungei Buloh
Nesting
Little Heron
A walk with a Volunteer Guide: Keith Hillier
Nature Photographer
with a Mission:
Julian Wong
Earth Day Programmes
Nature in
the City
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An Introduction to
Butterfly-Plant
Relationships at
Sungei Buloh Nature
Park
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Khiew Sin Khoon
Park Volunteer

Lime Butterfly
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The
success of Sungei Buloh
Nature Park's Butterfly Trail has brought our winged friends to the fore,
as they are usually the first of nature's ambassadors to greet visitors to
the Park.
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Located at the main boardwalk leading to the Visitor Centre, the Butterfly
Trail's colourful flowers have attracted several species of the larger
butterflies at Sungei Buloh
to feed at the trail. These butterflies, particularly the Blue Glassy Tiger,
Dark Glassy Tiger, Common Mormon and Common Palmfly,
are frequently seen in the vicinity of the trail at most times of the day.
Sungei Buloh, usually
associated with bird-watching and mangrove flora and fauna, is also home to
about 40 species of butterflies. Whilst this is not a large number of
species, it is quite important to note that the diversity of the butterfly
species has a direct relationship to the number of species of plants found at
the Park. The caterpillars of most species of butterflies feed on plants
(with the exception of certain Lycaenidae species
that are "carnivorous" and feed on coccids and mealy bugs). The
vegetation of Sungei Buloh
cannot be compared with, for example, Bukit Timah
Nature Reserve, or the Central Catchment Area where the majority of the
250-odd species of butterflies in Singapore can be found.
It is therefore important to understand the ecology of the butterflies, in
particular, their dependence on the plant species at Sungei
Buloh. Whilst most adult butterflies feed on flowering
plants and damp patches on forest floors, their caterpillar stages are
heavily dependant on the particular host plant of
the species.
For example, the often-encountered Blue Glassy Tiger (Ideopsis
vulgaris macrina) feed on a type of
creeper-weed found commonly at Sungei Buloh. It is believed that the Blue Glassy Tiger's
lookalike, the Dark Glassy Tiger (Parantica
agleoides agleoides)
also shares the same host plant.

Common Mormon
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The
elegant Common Mormon often found fluttering near the Lantana flowers,
depends on its host plant, the Indian Curry Leaf Plant (Murraya
koenigii) or in its absence, Citrus plants.
The Common Palmfly feeds on the various palms
found at the Park, and its favourite is the Yellow Cane Palm (Chrysalido carpus lutescens).
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The
list goes on, and for many of the butterfly species, their host plants are
still unknown, and only through close observation and a dose of good luck
will the gaps in our knowledge be filled in.
There are several species of Lycaenidae (these are
small fast-flying butterflies) found at Sungei Buloh which occur in symbiotic relationship with the Kerengga ants. These are the Common Tit (Hypolycaena erylus teatus) and the Centaur Oak Blue (Arhopala
pseudocentaurus nakula).
Both species are known to feed on the leaves of Eugenia species.
The caterpillars of these two species exude a kind of sweet secretion on
which the ants feed, in return for protection from predators. With the fierce
"fire ants" protecting them, the caterpillars of these butterflies
have a much higher chance of survival in the wild. It would take a very
determined and thick-skinned predator to ignore the painful bites of the ants
to get at the caterpillar. So the next time you get bitten by these
"fire ants" at Sungei Buloh
and secretly hope that these ants be exterminated, spare a thought for the
survival of at least two of the butterfly species sharing the Park with us.
The
fruit trees that can be found in Sungei Buloh are also known host plants to several species of
butterflies found at the Park. Amongst these are the Mango—host plant for
the Baron (Euthalia aconthea
gurda), Rambutan—host
plant to Blue Nawab (Polyura
schreiber tisamenus),
Lime (various Citrus species)—host plant to Lime Butterfly (Papilio demoleus malayanus), Banded Swallowtail (Papilio
demolion demolion),
and Common Mormon (Papilio polytes romulus).
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Caterpillar of the
Common Mormon
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Pupae of the
Common Mormon
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Even
the humble grasses, lallang and "weeds" like the Common Asystasia support several species of butterflies. The
Common Asystasia is the known host plant for the
Great Eggfly (Hypolimnas
bolina bolina) and
the sun-loving Blue Pansy (Junonia orithya wallacei). The
latter can usually be found along the perimeter fence at the Park which is
near the neighbouring farms. The pretty Common Tiger (Danaus
genutia genutia)
feeds on a creeper-vine which can be found growing along the fence
separating the Park from one of the neighbouring farms.
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The
common Derris species, usually associated with Mangrove flora, is believed
to support at least two species of butterflies. These are the Sumatran
Sunbeam (Curetis saronis
sumatrana) and the Common Awl (Hasora badra badra). The Sumatran Sunbeam is a fast-flying butterfly
with bright orange black-bordered wings above, and a silvery white
underside. This species is one of the resident species at Sungei Buloh, and is usually
found near coastal areas. This butterfly is not found in the other nature
reserves in the Central Catchment area.
It is therefore extremely important to understand the butterflies'
dependence on plants for survival. Without the existence of its particular
host plant, the corresponding butterfly species will become extinct at the
Park.
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More
articles about butterflies
at Sungei Buloh
List of
butterflies
at Sungei Buloh
(1999-2000)
(Vol 7 No 2, Aug 00)
Butterfly
Monitoring and Introduction
at Sungei Buloh
(Vol 6 No 3, Dec 99)
Butterflies
and their food plants
(Vol 6 No 1 Apr 99)
Butterfly
Appreciation
(Vol 5 No 3, Nov 98)
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