Habitat networks have a vital function in inhibiting habitat fragmentation and in enhancing biodiversity conservation due to connectivity among habitat patches. However, in previous studies, habitat network optimization has focused mainly on landscape structural connectivity rather than on functional connectivity, but the latter has more ecological significance. Therefore, the objectives of this study were to optimize habitat networks by combining the graphic and the probability of moving between patches theoretical methods for landscape functional connectivity and to attempt to answer the following research questions:(1) What characteristics are exhibited by habitat networks that are optimized through functional connectivity? (2) What advantages do the optimized networks have in reserve plan and land-use plan implementation? Using this approach, an ideal threshold and an acceptable threshold were calculated and applied to classify current corridors, respectively, as well as newly added patches and corresponding corridors, which have significant landscape functional connectivity. The Su-Xi-Chang area, at the center of the Yangtze River Delta region of China and representing rapid urbanization, was selected for the study. The little egret (Egretta garzetta) was chosen as a regionally representative species, which is commonly recommended by animal ecologists. The results showed (1) that the optimized habitat networks possess a higher density and clearer aggregation centers, whereas the optimized arterial networks have a high fitness with the long-distance migration direction of the little egret, which has already been proved and is commonly accepted, and (2) that optimized habitat and arterial networks comprising patches and corridors with significant features of landscape functional connectivity were both ideal results of the current habitat network optimization. This conclusion was verified by the network connectivity indices alpha (α), beta (β), and gamma (γ). Optimized arterial networks were recommended due to similar values of network connectivity indices and fewer habitat nodes and migration corridors than those of optimized habitat networks. Optimized arterial networks can be adopted as the minimum boundary of optimized habitat networks of the study area, especially in rapidly urbanizing areas, which provides a new idea suitable for regional biodiversity conservation. Furthermore, both current and newly added habitats and corridors were identified based on the land-use type classification issued by the Ministry of Land Resource Management of China, which can be easily adopted into local land-use planning and highly operatively implemented by land resource management. The developed approach of this study highlights habitat network rebuilding and development research, integrates a biodiversity conservation plan into local land-use planning, and increases the efficiency of both biodiversity conservation and land resource management.