Bluebirds

This is the 4th day that I have had bluebirds in the backyard.  Unfortunately, my bluebird house seems to have been claimed by sparrows, so I have cleared out their beginnings of a nest and am frantically researching a way to keep the sparrows away.  Any advice would be quite welcome. 

Yesterday we went to the National Geographic Headquarters to see the incredible PhotoArk exhibit of endangered species.  This collection of animal portraits on black and white backgrounds is absolutely stunning.  For a brief video about the project go HERE.

You can see some of these exquisite photos on the photographer, Joe Sartore's Website.