In the later levels, you’ll encounter flying probes.  They are conducting a scientific survey in the area and generally keep to themselves, but you should avoid them!

The mischievous rovers are intelligent and continue to learn quickly how to avoid capture.  They’ll enlist the help of the flying probes in later rounds and the probes will begin to track you!  You should really avoid those…  If a seeker crashes while pursuing your recovery vehicle, one of the passive ones will come after you!

Focus on your rover recovery mission, but avoid the chaos…   Good Luck!