ADVANCE FOR USE FRIDAY, JULY 5 AND THEREAFTER - In this June 12, 2013 photo, Ben Marks, manager of the bird collection at Chicago's Field Museum of Natural History, holds an identifica

 

              ADVANCE FOR USE FRIDAY, JULY 5 AND THEREAFTER - In this  June 12, 2013 photo, Ben Marks, manager of the bird collection at Chicago
ADVANCE FOR USE FRIDAY, JULY 5 AND THEREAFTER - In this June 12, 2013 photo, Ben Marks, manager of the bird collection at Chicago's Field Museum of Natural History, holds an identification tag of one of the museum's collection of great horned owls. The Field's collection of birds is the fourth-largest in the world with over 500,000 specimens. The museum, one of the world's pre-eminent research centers, is facing budget problems that is forcing it to cut research staff. Field President Richard Lariviere says the museum is poised to recover financially within two years. But some scientists say the cuts in its research operations will be significant. (AP Photo/M. Spencer Green)