Link to English Wikipedia entry: Yellow-billed Duck
Link to German Wikipedia: Gelbschnabelente
Link to French Wikipedia: Canard à bec jaune
Link to EOL.org: Anas undulata
Link to iNaturalist.org: Anas undulata
Links to my pictures: Yellow-billed Duck
Binomial Links for Anas undulata on www.guenther-eichhorn.com
Dr. Günther Eichhorn Travel Website
Soaring website