Spring has Sprung Lovely Bluebird

I wish I could take pictures of birds like this!  But I do have Bluebirds in the area and love watching them.  They usually fly in pairs and look for worms.  They do not have any interest in my bird feeders.  I now have 2 tiny birds (I think maybe a wren or warbler) finishing a nest they built last year.  They never used it last year when completed so I hope there are eggs this year.  Of course I just know its the same 2 birds.  They have wondering singing voices.