Spring birds

This is my latest piece if bird inspired mixed media. As (I thought) spring was on its way it seemed appropriate to use one of my favourite little birds in a piece.
I'm happy with the collage and mixture of marks on the birds themselves. But I think the background needs to he lighter and perhaps evened out, it's a complementary grey/purple colour but its too rich. I'm considered cutting the birds out on their little trees an transferring them to a background of warmer climes!