Two definates for your trip
Col Soulor - migration at the moment. Daily birds present - Lammergeier, Golden Eagle, Egyptian Vulture, Booted Eagle, Short Toed Eagle. Passage Honey buzzard, Black Kite, Storks, Harriers (mainly Monties - 1 or 2 per day). Best times seems to be 11.00 -14.00. We had an Eleanoras falcon a couple of weeks ago, Black Vulture and they had Spanish Imperial Eagle on the 15th...
Walking around here could produce Rock Thrush (ask the volunteers where cap d'aout is), Rock bunting maybe a latish Red Backed Shrike (plateau below the col). Alpine and Red Billed Chough...Keep eyes on cliffs around the tunnels between Aubisque and Soulor...
Col Portalet
Good spot for Lammy. Rock Thrush in area, Ortolan???? Might get Snowfinch but I think Candanchu is more reliable.
Long shots
Pas D'Aspe - nr candanchu - Wallcreeper bred, might be around. Don't know specific sites.
Woods arounds Laruns and Arudy - hold White backed Woody - rocking and horse but will be nice walks through the woods. Head for the beech trees, biggest oldest, wettest and steepest woods you can find...