Northern Mockingbird

This bird was heard before being seen! The distinct call made us search the field until we spotted it hop up onto the top of a tree. You can kind of see it's beak parted mid song! I am continually impressed by the R7 + the RF100-400's reach. This photo isn't winning any awards, but it's enough to ID the bird when it was just a round orb to my naked eye.
Wikipedia
Audubon