Owing to the development and construction in the recent decades, original plains and hillsides are not much left, with little land still available for further usage. Under these circumstances, the lowland area will be bound to serious ecological impacts following the plain and hillsides. Even the areas of higher elevations could be under threat, too. This research investigated three heterogeneous forest types of lowland sites in Lu-Ku Town, Nantou County; site A was a mixed forest of broad leaf, site B, a forest of Phyllostachy edulis, and site C, an artificial fir forest respectively. Four different analyses of diversity indexes are made to understand the difference of the composition of butterfly community of these sampling sites. Besides, the type of forest, climatic factors and human disturbance were all taken into consideration to appreciate their influences to the butterfly composition.
