Spring is definitely here!

It came knocking at my door...!  Actually, this morning was a very nice morning, very quiet and sunny... and I kept on hearing these noises,.. like some tapping, or soft knocking at the door...
Well, I went to have a look and saw this busy tiny bird hard at work... making his nest!  First time my bird house has a guest!  I love him already!  Isn't he cute?