Hey I just joined today (building a new foam stealth plane from scratch), and I have some questions about CANARD placements / designs...

I know for the canard to have maximum performance, they need to be some distance in front of the wings. (like this one)


I noticed a lot of modern fighter jets have canards on the fuselage beside the intake exhaust ports, rather than near the cockpit.
Could someone please tell me WHY they are placed in this location? Is there some kind of benefit having the canards further away from the main fuselage body?
Could it be because they don't want the disrupted air going into the intake ports?
EXAMPLES:




Also, I noticed some planes have canards (ones on the main fuselage body near the cockpit) either above or below the wing location. I'm assuming this is to avoid the turbulent wind from the canards flowing over the main wings during level flight and positive pitch movement ???
Anyways, I'd appreciate an explanation on this concept as well.
EXAMPLES:




I already know you don't want the disrupted airflow going into the intake ports...

So, any answers to these questions would be greatly appreciated!