Both E's were on the nest when M15 comes flying in with a fish and the female intruder hot on his tail to try and steal it. M15 lands and E21 on the left is in position to claim the fish - the intruder lands on E22 who is not happy and reacts fiercely flapping its wings and sending the intruder packing! The intruder lands on a branch below the nest and M15 goes to the spike extension and is vocalizing. WTG E22 for defending the nest and thwarting the intruder's attempt to steal the fish that Dad brought back for you and E21.