I currently have a Reaper and a Vulture active on my map. I placed them in the quick filter Favorites so I can see them both.
But unlike the Reaper, the Vulture isn’t shown on the map when the quick filter Targets is applied.
Nor is it show with the Soviet forces filter active.
I think that maybe the vulture should be in the Targets filter which shows us all Rivals. And the Reaper and the Vulture are basically super Rivals.
What do you think. 
Good observation.
If there actually is a filter (idk) for the reaper, it should be changed to tyrants in general.
Additionally it could be nice to have a filter that shows all soviet/FNIX stuff. Not just structures, but also rivals (and the factions tyrant).
With that you could easier see where i.e. soviet rivals are, to hunt them for communication tokens.
Thank you for posting this!
I did the exact same double summon (my first time x2) & they both even appeared at the same locations as yours, but my map being a bit busy in the South Coast I couldn’t see the Vulture, (also I was assuming it’d be in the Farmlands…)
Thanks to your post I have it located & marked as a favourite, too- now to go pound it with .50 AP 
photos unrelated just sharing my Reaper experience
UPDATE
Vulture progress
