Its specialized body is covered with extremely thick feathers and have oil sacks at the base of their tail which they use to to coat their feathers with the oil. This protects the skin from the freezing water and air temperatures.
They dive for their food, even swimming or flying under water to catch some of their food. They have a membrane that is pulled over the eyes while under water. Scales also close the nostrils as they search for food under the water. Here the bird searches for food by putting its head under water before diving.
Here the water Ouzel dives after locating some food on the bottom.
Here it surfaces head first after being under water for about a minute.
Walking back to the shallow water, the American Dipper surveys the water before another dive.