Which specific aquatic vegetation seed is mentioned as an important source of concentrated energy in the diet?
Answer
Seeds of *Najas* (naiad)
The Wood Duck diet is diverse, but certain aquatic plant components are highly valued for their energy density. Among the seeds derived from wetland vegetation, the seeds produced by *Najas*, commonly referred to as naiad, are specifically highlighted as a vital component of their seasonal food supply. These seeds provide concentrated energy, functioning similarly to the high-calorie nuts consumed in the fall, but available seasonally from submerged aquatic plants, contributing significantly to the overall carbohydrate intake of the ducks.
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