Let’s hope it doesn’t come to a point where this is the preferred means of communications or cartography in a domestic emergency in the United States. However, Popular Logisticsis committed to makings its readers aware of all types of systems, although we’ll probably drawn the line at squirrels. Here’s an image of a German World War I photo-taking pigeon, from PigeonBlog:
Link to concise article on this subject on PigeonBlog here.