How sad. I hope momma was able to move her babies to a safer place.

Nothing to do with birds however, last summer I watched our black squirrel move her 2 babies from one nest to another. Another predator in the neighbourhood have prompted that decision, I'm sure. It was the most incredible thing to watch her carries the little ones in her mouth, much like a cat carries her kittens. Well, both her babies made it and came back to collect peanuts on our deck

That was one smart momma squirrel

Betty