Black-bellied Whistling Duck (Dendrocygna autumnalis)
We got several good looks at the whistling ducks throughout the morning, both in the lake and perched on various stumps and trees around the water's edge. But the best by far was this pair that was perched atop a trailside nesting box.
You can see the entire set of shots from Brazos Bend here.
For more great bird photos from around the world, check out Bird Photography Weekly #37.