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Survival: For wildlife, the basic challenges are simple - survive and reproduce. However, the intricacies of survival and reproduction in birds are nothing short of amazing. Nowhere is this more evident than in the interplay among foraging, flight, and reproduction in waterfowl.
Many aspects of a duck's physical and physiological machinery are adapted to flight. Wings and feathers clearly are adaptations for flight, but other features may not be so obvious. For example, the energy requirements of flight are high. As a result, ducks and geese must have ready access to habitats with sufficient food sources, and must consume hefty volumes of food while there. In fact, some geese spend as much as 90 percent of daylight hours feeding during winter. And it is not uncommon for a duck and a goose to spend 80 percent of the daylight hours feeding, with much of the remaining 20 percent spent swimming or flying to the next feeding location! But even for species that don't spend that much time feeding, food and energy considerations are key to survival during winter and to successful reproduction the following spring.
