The duck that you are referring to is known as the American Black Duck. These ducks have a distinct coloration with dark brown bodies and pale gray-brown heads. The contrast between the dark body and light head creates a striking appearance. One notable feature of the American Black Duck is its yellow-green bill, which adds a splash of color to its overall appearance.
In terms of gender differences, males tend to have slightly darker plumage compared to females. Females, on the other hand, are often a bit paler in coloration. This difference in color can make it easier to distinguish between the two genders. Additionally, the bill of the female American Black Duck is typically duller in color, with an olive hue.
When these ducks take to the skies, they reveal another unique characteristic. The underwings of the American Black Duck are a vibrant white color. This contrast against the dark body plumage is quite striking and can be easily observed during flight. Furthermore, if you look closely, you will notice that the secondaries, also known as the speculum, have an iridescent purple coloration without any white borders.
Now, let me share a personal experience I had with American Black Ducks. I remember visiting a local wetland area, and I was fortunate enough to spot a group of these beautiful ducks swimming peacefully in the water. The contrast between their dark bodies and light heads immediately caught my attention. As I observed them closely, I noticed the subtle differences in coloration between the males and females, with the males displaying slightly darker plumage. It was fascinating to see their yellow-green bills as they dipped their heads into the water, searching for food. Later, I was lucky enough to witness a few of them taking flight. The bright white underwings were truly captivating against the dark backdrop of their bodies. I was also intrigued by the iridescent purple color of their secondaries, which added a touch of elegance to their appearance.
The American Black Duck is a species of duck with dark brown bodies, pale gray-brown heads, and yellow-green bills. Males tend to have darker plumage compared to females, who are slightly paler in color. During flight, their underwings appear bright white, and their secondaries have an iridescent purple coloration without white borders. These ducks are truly a sight to behold, and observing them in their natural habitat is a memorable experience.