Strange Noises

We have birds living in our fireplace.

Again.

We really need to solve this problem. But we can't until the baby birds living in there are big enough to fly away. After all, I don't want to kill some baby birds! Especially as then we would have dead birds in our chimney!

The noises that they make, chirping, and the parents flapping their wings, often freak out company. They think something is coming to attack them out of the fireplace or something!