Guidepost 2: What are the four goals of the scientific study of human development, and what do developmental scientists study? 1  The study of human development seeks to describe, explain, predict, and modify development.  Ways of studying human development are still evolving, making use of advanced technologies.
Dabbling ducks eat plants, seeds, grasses and other small insects and animals that they find on or under the water. Ducks which have broad beaks, (shovelers) sift their food for insects, snails and seeds from the mud.
There are many species of water birds; therefore it is important to look at the beak and feet to determine what they are and what they might eat. Birds having flat beaks such as swans and ducks eat mainly waterweeds, grass, seeds and a variety of beetles and bugs. Usually the chicks of these birds are self feeders and can be fed on grain, chicken pellets, and soft fleshy greens.