This is a video of a violent interaction between the mother and the perpetrator recorded on the first day of infanticide recorded on April 28, 2010.
(Photo Credit: Lab of Behavioral Ecology and Evolution at Seoul National University)
The perpetrator attacks by pecking.
(Photo Credit: Lab of Behavioral Ecology and Evolution at Seoul National University)
The perpetrator drags out a nestling.
(Photo Credit: Lab of Behavioral Ecology and Evolution at Seoul National University)
Source: Laboratory of Behavioral Ecology and Evolution at Seoul National University