Photos: This one's for the birds

This image provided by the Colusa National Wildlife Refuge showing a male falcated duck was identified at Colusa National Wildlife Refuge, Calif., Dec. 8, 2011. This bird, common in China, is an extreme rarity for California. Since it was spotted, thousands of visitors from the U.S. and Canada have flocked to the refuge to see it. (AP Photo/Colusa National Wildlife Refuge, Michael Peters)