Despite being vulnerable to environmental pollution, Common Goldeneye populations remain relatively stable. This duck breeds in northern forests across the world. Although some breed in northernmost United States, most breed across Canada. They winter in the United States when ice-free water persists. Most are found along the Atlantic and Pacific coasts. In the summer, Common Goldeneyes are insectivorous. In winter, fish, crustaceans and mollusks are added to their diet (Eadie et al. 1995).