Piscivores are fish-eating birds that are typically found on large lakes and rivers. This group includes the Mallard, the American Black Duck, the Wood Duck and the Green-winged Teal. Across most of the acid-stressed regions of eastern Canada, the Black Duck is the most common dabbling duck. During the breeding season, female and young dabbling ducks forage heavily on aquatic invertebrates. This guild is very adaptable and can use a wide variety of food resources available in all types of habitat.
Acid rain reduces the quality and diversity of their invertebrate prey.
This group includes the Common Goldeneye, the Hooded Merganser and the Ring-Necked Duck. These ducks also forage primarily on aquatic invertebrates through the breeding season, and their distribution and breeding success is influenced by the availability and quality of invertebrate prey in acid-stressed lakes.