I don't know what happened but there certainly wasn't many deer in my area this year. That includes big woods and farmland. I border 800 acres of state land. One evening last summer, I watched a small twin engine prop plane flying low along my southern border. About every 100 yds. it was dumping a cloud of something and I don't believe that it was fuel. Didn't think of getting a photo at the time, but was thinking "That's my land".