We studied the feeding ecology of the Black Wood Pigeon (Columba janthina), a species endemic to the East Asian Pacific Islands, and determined the species’ dietary composition and food preferences on Ulleung Island, South Korea, through field observations. From March 2016 to February 2018, the diversity of food items consumed was low, with the 10 most common plant species (from a total of 33) accounting for over 80%. Food availability varied depending on plant abundance, but this influence was minimized because of factors such as delayed fruit ripening. Drupes were the most favored food items (60–68%) but were replaced by nuts and weed seeds during the spring and winter months. Dietary composition and food preferences were related to the abundance of food items based on their phenology, but a steady, high preference for Aphananthe aspera was observed throughout the study period. The abundance of Prunus takesimensis in June was correlated with changes in the Black Wood Pigeon population. This study is the first to assess the feeding ecology of Black Wood Pigeons using field observations and suggests that the availability of different food items affects population changes on the East Asian Pacific islands.

我们研究了黑鸽子（Columba janthina）是东亚太平洋岛屿特有的一种物种，并通过实地观察确定了韩国Ulleung岛上该物种的饮食组成和食物偏好。从2016年3月到2018年2月，所食用食物的多样性很低，其中10种最常见的植物物种（共33种）占80％以上。食物的供应量取决于植物的丰度，但是由于诸如水果成熟延迟等因素，这种影响被最小化了。核果是最受欢迎的食物（60-68％），但在春季和冬季，它们被坚果和杂草种子所取代。饮食组成和食物偏好与食物的物候有关，与食物的丰富程度有关，但对Aphananthe aspera的需求却稳定而高在整个研究期间都进行了观察。六月份的Prunus takeimensis的丰度与黑木鸽种群的变化有关。这项研究是首次通过野外观察评估黑斑鸠的摄食生态，并表明不同食物的可利用性会影响东亚太平洋岛屿上的种群变化。