A new pair of swans moved in and picked on the resident summer family of 2 adults and 3 juveniles.
One of the intruder swans were very aggressive and picked on this juvenile.
The resident adult swan seen the new intruder coming and called her juveniles but the juveniles went in the other direction from the adult calling.
As the intruder came close to the juveniles, the parent swam over and lured the intruder away. But, the juveniles were still blocked from joining its parent. This one got attacked and escaped.
The family were chased away by the intruder - they all survived this encounter.