Supplemental Video

This is a supplemental video related to the ongoing submission of short communication. The video shows two independent cases of the Eurasian Jay attracted to the snake-specific alarm call of the Oriental Tit and attempted to predate nestling/fledging. The first part of the video shows a Eurasian Jay attracted to the speaker playing back "jar" call of the Oriental Tit and tried to predate nestlings inside the nest box. The second part of the video shows a pair of Eurasian Jay attracted to the speaker playing back "jar" call of the Oriental Tit. There was a fledgling who was already fledged before our experiment and hidden in the vegetation, and one of the jay chased it when the fledgling flew off.本视频为一篇处于投稿阶段的短篇通讯（Short Communication）的补充演示视频。视频展示了两起独立案例：松鸦（Eurasian Jay）被东方山雀（Oriental Tit）针对蛇类的特异性告警鸣声吸引，并试图捕食雏鸟或离巢幼鸟。视频第一部分展示了一只松鸦被播放东方山雀‘jar’型鸣声（jar call）的扬声器吸引，试图捕食巢箱内的雏鸟。视频第二部分展示了一对松鸦被播放东方山雀‘jar’型鸣声（jar call）的扬声器吸引。实验前已完成离巢的一只幼鸟藏匿于植被中，当该幼鸟飞离时，其中一只松鸦对其展开追逐。