by Andrea Corso
Following on from THIS POST (below) on Atlas Flycatcher, a photo illustrating one of the core ID issues, the variation of white patterning in the greater coverts. Also see first post for helpful new questions and comments (at end).
Male Atlas Flycatcher
In this photos, taken by Davide De Rosa in Morocco during breeding season, it is easy to detect 4 black GCs of which the 4th shows only a very narrow white fringe around the feather