Zhipeng Xu, Bin Li, Hui Yang, Jianping Liu and Xingfu Yan, 2025. Fear No Colors? Eurasian Tree Sparrows are More Wary of People Dressed in Red. Pakistan J. Zool., 57: 2367-2374. 
DOI: https://dx.doi.org/10.17582/journal.pjz/20231212044025