"If it looks like a duck, and quacks like a duck, we have at least to consider the possibility that we have a small aquatic bird of the family Anatidae on our hands," said Rose, quoting Douglas Adams.
You may not know it, but these semi-aquatic birds are some of the most dedicated parents in the animal kingdom.
A young emperor penguin took a wrong turn from the Antarctic and ended up stranded on a New Zealand beach - the first time in 44 years the aquatic bird has been sighted in the south Pacific country.
Next to him is a cormorant, an aquatic bird that helps him to catch fish.