I love this picture from The Atlantic (8 Feb. 2013) of a penguin colony of 9,000 found in Antarctica--with these two penguins getting all cozy together.
While the penguins were not easily seen from satellites in the "remote icy expanses," apparently they leave something behind that is observable, and that is their you-know-what--droppings.
What a way to find something so beautiful, but as they say bees do it, birds do it, and it's not just love they are talking about. ;-)
(Source Photo: here)