Have you seen the 8th Grey Arrows Drone Club Birthday Challenge and Treasure Hunt?
Eight subjects to be found and photographed over the next six weeks. Points for the subject, points for each bonus item found.
It seems like one of them should be easy for the participants in this thread!
4. A tractor working in a field
Bonus if it is a New Holland tractor
Bonus if there is more than one tractor working in the same field
Bonus if the tractors are two distinctly different colours/makes
Bonus if there is a combine harvester working in the same field.
Full details here