Ducks are waterfowl, a group of birds that also includes geese and swans. They are commonly associated with ponds, streams, rivers, and other wetland habitats.
Webbed Feet and Cold Water
Ducks use their webbed feet like paddles when swimming. Their legs also have a special adaptation that helps conserve body heat in cold conditions.
Warm blood traveling toward the feet passes close to cooler blood returning toward the body. Heat moves between these nearby blood vessels, reducing the heat lost through the feet. This process is called countercurrent heat exchange.
Feathers and Warmth
During preening, ducks spread oil from a gland near the base of the tail over their feathers. This helps maintain their water-resistant outer covering. Soft down beneath the outer feathers provides insulation.
Listen to the Ducks
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