http://www.birdhouseplans101.com/free-bird-house-plans

http://backyardbirding.biz/2011/10/16/esschert-design-wren-bird-house-antique-wash-with-copper-roof/

http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords

http://www.google.com/imgres?q=bird+house+designs&um=1&hl=en&safe=