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.
- Safflower seed is eaten by many birds. At my feeders, the birds that frequent feeders filled with straight safflower seed include chickadees, nuthatches, titmice, Purple Finches, Rose-breasted Grosbeaks, and Evening Grosbeaks. Other birds that eat safflower include cardinals, house finches and more.