What characteristic regarding their body profile causes grebes to be superior divers compared to many ducks?

Answer

Their legs are set far back on their bodies.

The placement of a grebe's legs far toward the rear of its body enables them to propel themselves deep underwater effectively, making them excellent divers. This positioning makes them awkward on land.

What characteristic regarding their body profile causes grebes to be superior divers compared to many ducks?
birdclassificationfamilyduckGrebe