ADVANCE FOR USE FRIDAY, JULY 5 AND THEREAFTER - In this June 12, 2013 photo, volunteers remove the feathers of birds as they prepare specimens for the bird skeleton collection at Chica

 

              ADVANCE FOR USE FRIDAY, JULY 5 AND THEREAFTER - In this  June 12, 2013 photo, volunteers remove the feathers of birds as they prepare specimens for the bird skeleton collection at Chica
ADVANCE FOR USE FRIDAY, JULY 5 AND THEREAFTER - In this June 12, 2013 photo, volunteers remove the feathers of birds as they prepare specimens for the bird skeleton collection at Chicago's Field Museum of Natural History with a great blue heron in the foreground. 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)