Pigeons

[Refugee]

That looks like a domestic cat has tortured it to death. They usually start locally and then cart the bird away to finish it off else ware.
We had one attack a wood pigeon in our garden but in our case it got onto a seedling bed that had an electric fence to stop the cats killing the seedlings by stamping them back into the ground.
The pigeon survived and flew again. The cat sulked for quite a while before leaving the garden.