Merganser Parade
I saw these hooded mergansers (Lophodytes cucullatus) swimming in a small pond, at Albany, Georgia. I was thinking about the saying get your ducks in a row. It's just that when we see them lined up, they are usually in a column.
"Hooded Mergansers find their prey underwater by sight. They can actually change the refractive properties of their eyes to improve their underwater vision. In addition, they have an extra eyelid, called a “nictitating membrane,” which is transparent and helps protect the eye during swimming, like a pair of goggles." - allaboutbirds.org