I'm re-posting a deleted comment because I found it to be of merit:<p>"Actually, in the original story about the photo the photographer claimed to have set up everything in advance, and used some sort of sensor to have it automatically fire when the wolf jumped over it; he may have said that he'd previously seen them doing so."<p>This is a scenario I had not considered, not having done nature photography before.  Perhaps I will set up some strobes and a motion sensor next time I throw rotting food into my backyard to see if it disappears by morning.