The Ritz Carlton of all birdhouses.  This homemade bird house is a gem-your neighbor's birds will be jealous.  It is approx. 20"x7.5 and 15" tall and has a spot for your plant. There are 3 separate areas for the birds to move in. You can clean it out easily-just need a screwdriver.  This fits perfectly on a 4x4 post. 

Photo 3 is the bottom that fits over the 4x4 post