Roseate Spoonbill with Mouth Open

I don't remember why this Roseate Spoonbill has its mouth open, but I'll always remember the unique shape of the bill. Focus tracking these feeding birds is a significant challenge. They are never still - and their heads swing back and forth constantly.
 
This image was captured at Ding Darling National Wildlife Refuge on a day when the tide schedule aligned with sunrise.