Very thin branches, hooked tips with terminal soredia visible at 40x magnification
No pseudocyphellae, isidia or apothecia
No central cord
Very intense yellow face, clearly no cap, but also no streaks on breast. Small, warblerish beak, shortish tail. Yellow all over, except some green/grey back. Two of them, very similar, one a bit paler. Female Wilson's? Or yellow? Wish I had a better camera.