A non-breeding Pied-billed Grebe. While breeding, the bill is whitish with a black band (“pied’).
Pied-billed Grebes can adjust their buoyancy and often use this ability to float with just the upper half of the head above the water. They catch small fish and invertebrates by diving or simply slowly submerging. They build floating nests of cattails, grasses, and other vegetation.
Pied billed GrebeGrebe