de: Wasservogel, Schwimmvogel m.
en: water bird, waterfowl
es: aves acuáticas
it: uccelli acquatici
nl: watervogel
pt: pássaro aquático
tr: su kuþu, yüzgeç kuþu

The following video provides you with the correct English pronunciation of the word "oiseaux aquatiques", to help you become a better English speaker.