It's hard enough to make a child hold still for a photo; it's equally as difficult to make a duckling do the same. They're always running around and can't understand any human languages (or so I think), making my job even more difficult. Every once in a while, though, you come across one that seems like it was created just to be photographed by you, a sort of mutual understanding of one another between photographer and subject. It also helps that he (?) is really cute.