I paid a visit to the Smithsonian Biology Conservation Center on Sunday. Typically only once a year the public is invited to visit the center. This past weekend was ideal due to the mild temperature and slight breeze. There were exhibits explaining the activities undertaken by the scientists, researchers and interns at the center. My favorites were the birds i.e. Red Crowned cranes, kingfishers and rails. I tried to see the bison, but they were off in a small valley out of sight. Photographing the birds was a challenge since they were in enclosures with wire fence fronts. The lighting was also a challenge being fluorescent tubes and some other fixtures. A wide aperture helped with the fence and a neutral target helped with the lighting.