Choo Teik Ju’s sent in an image of the Common Kingfisher (Alcedo atthis) bashing a small fish it just caught against the branch it is perching on (left). Although a small fish, yet it has to be vigorously bashed before swallowing. As the kingfisher is bashing the fish, it is noted that the nictitating membrane covers the eye as a form of protection against flying debris. Kingfishers also does that just as it zoom in on a prey in the undergrowth. Check out more about the nictitating membrane HERE.
The picture was taken at the Japanese Garden in Jurong, Singapore.