1. North American subspecies of tundra swan having a soft whistling note
   - whistling swan

Type of: Cygnus columbianus, tundra swan

• heraldic
• heraldic bearing
• heraldically
• heraldist
• heraldry
• Herat
• herb
• herb bennet
• herb Christopher
• herb doctor
• herb garden
• herb mercury
• herb of grace
• herb Paris
• herb robert
• herb roberts
• Herb Simon
• herb tea
• herba impia
• herbaceous
• herbaceous plant
• herbage
• herbal
• herbal medicine
• herbal tea