Reserva Ecológica Costanera Sur

Sitio realizado por aficionados a la observación de aves desde 10 de enero 2006

Masked Duck - Lake Duck

With the occurence of the Lake Duck it is time to show the differences with the Masked Duck, two stiff-tailed ducks. Both males and females of these species are look-alikes. As far as their habits go two things to take into account. Lake Ducks tend to keep their tail cocked up more often than Masked Ducks. Secondly, Lake Ducks are found in open spaces whereas Masked Ducks are more secretive and stay hiding in the vegetation.

General characteristic

MASKED DUCK
Nomonyx dominicus
LAKE DUCK
Oxyura vittata
Pato fierroM/Masked duckM© J. Simón Tagtachian
Mancha alar
Pato zambullidor chico M/Lake Duck M© Rodolfo Pani
Sin mancha alar



Males

MASKED DUCK
Nomonyx dominicus
LAKE DUCK
Oxyura vittata
Pato fierro/Masked Duck© J. Simón Tagtachian
Bull light blue bill with black tip
Black mask
White eyering
Black markings on chestnut upperparts
Pato zambullidor chico/Lake Duck© Sergio Cusano
Bill blue
Black hood
Lacks white eyering
Uniform chestnut upperparts

Females

MASKED DUCK
Nomonyx dominicus
LAKE DUCK
Oxyura vittata
Pato fierro H/Masked Duck F© Claudia y Diego Bastías
Two white lines on face
Pato zambullidor chico/Lake Duck© Sergio Cusano
Only one subocular line on face