Understanding the relationships between giant panda (Ailuropoda melanoleuca) and their sympatric species is an important component in their conservation. In this study we evaluate the impact of sympatric species with three ranges of body size on the distribution and habitat selection of giant panda. We surveyed giant panda and their sympatric species occurrences by camera trapping and field survey in the Wanglang Nature Reserve, Sichuan, from May 2018 to June 2019. Ten wild species and one domestic species with high photographic presences were selected and clustered by body size indicators. Generalized linear models and redundancy analysis showed that the distribution of giant panda was significantly influenced by the presence of large- and medium-sized species and domestic cattle, but less so by small-sized species. Giant panda tend to avoid cattle by choosing more inferior habitats. Differences in the impact of the ten sympatric species and cattle on the giant panda habitat selection are reflected in three variables: slope, tree density and herb coverage. Our study suggests that; i) more attention should be paid to habitat protection and restoration, particularly for those habitats identified as most suitable for giant pandas; ii) as body size of other species present is a factor which adversely influences giant panda distribution, reductions in large-sized grazing species will be necessary to support giant pandas in nature reserves, and iii) residents should consider replacing cattle with smaller-sized domestic species.

了解大熊猫之间的关系（Ailuropoda melanoleuca）其同族物种是其保护的重要组成部分。在这项研究中，我们评估了三种体型同胞物种对大熊猫的分布和生境选择的影响。我们通过摄像头捕获和野外调查，于2018年5月至2019年6月在四川望朗自然保护区对大熊猫及其同伴物种的发生情况进行了调查。我们选择了10种野生物种和一种具有高摄影感的家养物种，并根据体型指标进行了聚类。广义线性模型和冗余度分析表明，大熊猫的分布受到大中型物种和家养牛的影响，但受小物种的影响较小。大熊猫倾向于通过选择更多的劣质生境来避开牛群。十种同胞物种和牛对大熊猫栖息地选择的影响差异体现在三个变量上：坡度，树木密度和草木覆盖率。我们的研究表明：i）应更加注意栖息地的保护和恢复，特别是那些被确定为最适合大熊猫的栖息地；ii）由于存在其他物种的体形是对大熊猫分布造成不利影响的因素，因此有必要减少大型放牧物种以支持自然保护区中的大熊猫，并且iii）居民应考虑以较小尺寸的家畜替代牛种类。i）应更加注意栖息地的保护和恢复，特别是那些被确定为最适合大熊猫的栖息地；ii）由于存在其他物种的体形是对大熊猫分布造成不利影响的因素，因此有必要减少大型放牧物种以支持自然保护区中的大熊猫，并且iii）居民应考虑以较小尺寸的家畜替代牛种类。i）应更加注意栖息地的保护和恢复，特别是那些被确定为最适合大熊猫的栖息地；ii）由于存在其他物种的体形是对大熊猫分布造成不利影响的因素，因此有必要减少大型放牧物种以支持自然保护区中的大熊猫，并且iii）居民应考虑以较小尺寸的家畜替代牛种类。