There are times when a photographer is presented with having to make a choice between two fleeting subjects, both being once in a lifetime opportunities. To illustrate the point, suppose you're on a field trip with fellow photographers, and you're looking for interesting close-ups of insect life when someone alerts the group to a beetle crawling in the sand. This is a truly rare and colorful beetle, and it's about to crawl under a log. Time is of essence...
