Where are the lamellae located in waterfowl?

The lamellae are specialized structures found in the bills of waterfowl that play a crucial role in their feeding habits. These comb-like structures help filter food from water, allowing birds to efficiently consume small organisms such as invertebrates and plant matter. The lamellae work by acting as a sieve, separating edible items from non-edible material as the waterfowl forages.

In contrast, the other options do not accurately describe where lamellae are found in waterfowl. The feet are adapted for various activities like swimming or walking, while feathers serve a different purpose, primarily for insulation and flight. Wings are also essential for flight and maneuverability but do not contain lamellae. Therefore, the correct identification of lamellae as structures within the bill highlights their significance in the feeding mechanisms of these birds.