Yes, I have seen a rook or a very large crow eating a blackbird.
Last year, a male blackbird was feeding a baby blackbird a worm in my back garden. It was such a lovely sight. As the baby went to take the worm, the large crow or rook swooped and picked up the baby.
I opened the kitchen door, ran and screamed wherin the baby was dropped. The garden is enclosed and the baby wasnt able to fly properly, so I put washing basket over the baby to protect it (temporarily) and placed it under a shrub. (The wash basket had openings, for the adult bird to feed the baby through the basket).
Unfortunately, the crow/rook attacked/killed and then flew off with the adult. It was so sad as I loved the male adult bird. It worked tirelessly throughout the day to feed the baby and any others that I didnt see. I now discourage crows and rooks from visiting our garden at any time of year.
I was lucky enough to receive this descriptive story of bird eating bird. I used to think that it was a nice, civilised world in bird world, but it isn’t is it?
Birds eat birds without thinking anything of it. This rook took a parent bird away from its young!
It’s a good job there was someone around to help the young birds. And what a good idea to put a wash basket over it.
I remember how shocked I felt when I watched a rook in a hedgerow eating a dead blackbird. It was amazing to watch.
That’s nature I suppose. It has been going on for years, it’s just that we don’t see it very often.