Insects are a part of invertebrates that are found in most
ecosystems from land, aquatics to the underground. It has more than
one million species of insects have been described, accounting for
more than half of all known species on the Earth. Annually, the
number of species reported has continually increased (Blair RB, 1999,
Vu Van Lien, 2004, 2011). In the insect class, butterflies are well
known for their color and morphology, and are familiar to humans.
Butterflies are quite sensitive to habitat. The impact of environmental
change on the vertebrate populations often took a long time to be
recognized (Price P. W., 1975) and less noticeable than invertebrates,
while butterflies have responded early to environmental change. When
the natural forest is affected, the species and structure of the vegetation
was changed, leading the butterfly communities were also changed
(Blau W.S, 1980; Bobo K., 2006, Janzen, 1968). The change in status
of butterflies over time is largely due to the human impacts on the
communities of nature.
From the early years of the 20th century, many researches on
butterflies were published as a list of species in Vietnam and
Indochinese (Corber A.S., 1992). Up to now, butterflies have been
researched on many National Parks and Nature Reserves of Vietnam.
However, the study mainly focused on the inventory of species
composition.