merganser

waterfowl

Swimming birds collectively

• duckWaterbird that quacks
• goosanderSawbill diving duck
• commonWidespread and unremarkable

hooded · goldeneye · avian · ornithology · drake · hen · fledgling · brood · fish-eater

crest

Highest point or tuft

• feathersBird's lightweight covering
• iridescentShowing shifting spectral colors
• breedingReproductive cultivation of organisms

molting · eclipse · drake · hen · downy · speculum · coverts · preen · barbs · quills

submerge

Plunge beneath liquid

• underwaterBelow the surface
• fish-eatingConsuming aquatic vertebrates
• swimmingLocomotion through water

streamlined · buoyancy · depths · surface · aquatic · foraging · hunting · prey · trout · minnows

flyway

Established bird migration path

• seasonalRecurring at fixed intervals
• southwardToward the equator's direction
• northwardToward the top

overwinter · breeding · flock · stopover · long-distance · navigate · instinct · wintering · arctic · subarctic

freshwater

Non-saline aquatic environment

• lakesLarge inland water bodies
• pondsSmall freshwater bodies
• riversFlowing bodies of water

streams · wetlands · estuaries · coastal · boreal · nesting · riverbanks · ecosystem · conservation · biodiversity

• Mergansers
• fish-eatersosprey, kingfisher, pelican, heron, cormorant
• lake wildlifeperch, pike, bream, roach, eel
• waterbirdsducks, auk, geese, bittern, swans
• Waterfowlduck, goose, swan, mallard, drake
• duck-billed animalsplatypus, duck, mallard, shoveler, waterfowl