The "Ducks in a row..." seen in the picture atop this entry, where they are swimming in the pond in Central Park, include a Wood duck, a Mandarin duck, and a Mallard duck (respectively).
And the set of images directly below feature other duck types, a Khaki Campbell (swimming in the Hudson River), a Bufflehead, (swimming in the Jacqueline Kennedy Onassis Reservoir), and a Muscovy, who is also swimming in the Hudson (respectively).
The latter of these, a Muscovy, is featured in volume three of my Words In Our Beak book series...
|MY BOOK SERIES|
... which is now available on Amazon @ https://amzn.to/2IYkmpA OR any bookstore should be able to order it by giving them the book's title or ISBN: 9780996378543
Additionally, I will be discussing the Muscovy duck during my upcoming lecture/presentation at a "Speaking of Science" series which is scheduled to take place on the evening of 11-26-2018 at the New York Society for Ethical Culture (NYSEC). Info for this event @ http://bit.ly/2FaXuVw