What birds eat plankton?

Several bird species, particularly those that feed in marine environments, consume plankton as part of their diet. Notable examples include various types of seabirds, such as gulls, pelicans, and certain types of terns, which may feed on small fish and invertebrates that are associated with plankton blooms. Additionally, filter-feeding birds like some species of ducks and geese can consume plankton, especially in freshwater habitats. These birds play an important role in the aquatic food web by utilizing this abundant food source.