I was given a suet block feeder for Christmas, which has changed the variety of birds visiting - starlings, loads of.
The blackbird which fights over the garden, but does not use the feeder pole, has been not only seeing off the other blackbird, but also robins, bluetits, and anything else he can. He doesn't go for the starlings, though they have a go at the robins who go for their dropped bits - they are very messy eaters.
The wren has been having very thorough baths in the birdbath, but the blackbird hogs that as well.