食果性鳥類在肉果植物結果的季節，為了覓食而形成群聚，在熱帶的森林裡是常見的景象。 研究食果性鳥類對食物資源的利用以及其覓食行為，除了能夠瞭解隨著環境中食物資源供給量的改變，食果性鳥類與之相應的策略及族群的變動，同時也能進一步了解鳥類與肉果植物之間的相互關係。 大多數熱帶和亞熱帶森林中超過70%的植物會產生肉質果實，不論是種間種內、共域與否，這些植物在形態上展現出多樣化的差異，用以吸引特定傳播者族群、或競爭有限資源，使其達到繁殖利益最大化之目標。 這些差異如果實特徵、結果量和其他特性，都可能影響食果性鳥類的族群集合，不同的結實物候產生不同果實形質差異，也影響鳥類取食偏好。
台灣位處熱帶與亞熱帶的交界，具有豐富且多元的物種及種間的交互作用。 本研究針對恆春熱帶植物園區內會被食果動物取用的結果植物，以及取用這些食物資源的食果動物，提出假說測試環境中結果植物所提供的食物資源之特性，及食果性鳥類本身形值等因子，對於食果性鳥類覓食行為之影響。 期望在面對現今氣候變遷的環境下，提供熱帶與亞熱帶地區動植物群聚之生態及動態的資訊。

Fruiting-plants to frugivores are critical agents for survival. Feeding assemblages of birds were observed throughout a fruiting season, is a common phenomenon at the rain forest. To research the use of food resources and feeding behavior of frugivores, would be able to understand the changes in the supply of food resources in the environment, the changes in food resources and the corresponding strategies and ethnic groups, but also to further understand the relationship between birds and fresh plants. More than 70% of the plants in most tropical and subtropical forests produce fleshy fruits, where species are covariant or not. And these plants exhibit a variety of differences in morphology attracting specific disseminators, or competing for limited resources to achieve the goal of maximizing reproductive benefits. These differences, such as the actual characteristics, the results of the amount and other characteristics, may affect the collection of fruit-eating birds, different phenology produce different fruit quality and characters, but also affect the bird feeding preferences.
Taiwan is located at the junction of tropical and subtropical regions, with rich and diverse species and interspecific interactions. We proposed hypotheses for testing. This study will focus on the changes in the amount of food resources, distribution and other factors provided by fruiting-plants in Hengchun Tropical Botanical Garden, and its influence on feeding behavior and cluster activities of fruit-eating birds. It is expected to provide information on the ecology and dynamics of flora and fauna in tropical and subtropical areas in the face of current climate change.

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