The above video clip by Jason Cho a.k.a. jcho was taken at Singapore’s Sungei Buloh Wetland Reserve. It shows a male Crimson Sunbird (Aethopyga siparaja) fascinated with his reflection seen from a wound-up glass pane of a car side door. However, when he moved to the side mirror where the image was brighter and clearer, he became aggressive and confrontational.
This is a common occurrence as birds view their reflections as competitors, sometimes becoming extremely aggressive. For more accounts of such behaviour, see HERE.
This post is a cooperative effort between NaturePixels.org and BESG to bring the study of bird behaviour through photography to a wider audience.