aquatic bird

Từ điển WordNet v3.1 - WordNet Dictionary

noun

wading and swimming and diving birds of either fresh or salt water
• Hypernyms:
bird
• Hyponyms:
waterfowl, water bird, waterbird, swan, wading bird,
wader, gallinule, marsh hen, water hen, swamphen, seabird,
sea bird, seafowl