Recently I have seen groups of adult house sparrows, attack and kill fledgling house sparrows. It seems to happen when the mothers brings them to the food. The adults peck at the baby`s neck and head until it`s dead. Why are they doing this? I went outside to feed the birds today and the sound of the door frightened off a group that was in the midst of killing one and as they flew off a Blue Jay swooped down and grabbed the injured baby sparrow in it`s beak and flew up into a tree with it, what in the world is going on? I`m sad and confused, can you help me figure this out and tell me what, if anything, can be done to stop this behavior? I scatter the feed on the ground under a very large tree 3 times a day and put out plenty of food.... thank you,