Blackbirds nest

I had this beautiful blackbirds nest in my clematos she laid 4 eggs last week, as the nest was up near my window i used to say good morning every day to her yesterday i noticed a lot of sparrows flying around the nest and when i looked to day the eggs had vanished I found a bit of shell from one on the floor, the sparrows went in with revenge and ate them all i couldn't wait to see the baby birds