Trumpeter Swan
Cygnus buccinator
CA: Threatened
State threatened species in California
Large white swan with straight neck and black bill. Rare visitor to Bay Area wetlands; grazes native marsh plants, maintaining water quality in shallow ponds.
Plants that support Trumpeter Swan
3 plants
American Bulrush
Schoenoplectus americanus
grass
Winter foraging in tule marshes; key overwinter food resource
Bay Area native
Common Horsetail
Equisetum arvense
fern
Migration staging areas; spring and fall consumption in wetland habitats
Bay Area native
Hardstem Bulrush
Schoenoplectus acutus var. occidentalis
grass
Primary forage during migration and wintering in California wetlands, Oct-Mar
Bay Area native