Photography is a remarkable medium. In high-resolution photos, we can study every patch of skin, fur, or feather on an animal. High-speed burst shooting can capture fleeting moments of animal behavior in fractions of a second. What photography cannot capture, however, is sound—that vital yet invisible component of both animal and human existence without which an image may be incomplete. Today, using the example of two magnificent species of toucans inhabiting the western slopes of the Andes, I want to give you a glimpse of where photography does not tell the whole story.