In several duck species males have a vivid colouration meanwhile females are brown. As they go in pairs the male solves the problem of identification and the female goes unnoticed. So when females are found alone we realize we did not pay due attention to them. We begin with the females of the Ringed Teal and the Brazilian Duck, two duck species which have reopened the Coypu Pond.
Both in water or flying they show identification keys.
Standing or in water with folded wings both have white spots on the face, a green speculum, rosy legs and as it was said an overall brown colour, but....
| Ringed Teal Callonetta leucophrys  © J. Simón Tagtachian35 cm white brow white line from auricular zone to neck white throat and front neck barred flanks clearer rosy legs |
Brazilian Duck Amazonetta brasiliensis  © J. Simón Tagtachian38 cm white spot in front of eye white spot on bill base white throat flanks with a few mottles darker rosy legs |
In flight wing designs make them unmistakable.
 © J. Simón Tagtachiancircular white patch |
 © J. Simón Tagtachiangreen and blue sheen contrasting white triangular zone |