Definition: The word "duck head" refers to a small, circular indentation or depression on the underside of a duck's head caused by water droplets condensing near it during its incubation period. The term dates back to ancient times when ducks would deposit their young onto wet ground before they fledged in order to dry and prepare for warmer temperatures. These deposits eventually formed a series of indentations that are now known as "duck heads." Duck heads can vary from small, shallow depressions to larger ones such as the ones seen on the underside of a duck's head or under its feathers during its incubation period. They are often used to identify and track ducks' movements in water, making them an important diagnostic tool for bird behavior research. However, it is important to note that duck heads have been found on several different species of ducks and not all duck heads will be identical, as each species has unique patterns and characteristics.
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