Can anyone tell what kind of bird it is from its eggs?

This picture shows the national geographic wallpaper of July 20 12:

Although these eggs in the State Museum of the University of Nebraska have a history of more than 100 years, they still keep bright colors. The hole in the eggshell was hollowed out to make specimens, including a huge African raven egg (far right) and five blue-brown thrush eggs (far left).