A first for Groningen, and again a stunner! Unfortunately a very secretive bird and this is all I could make of it. Note the typical Eemshaven habitat with windmills everywhere, and in the middle the new RWE-powerplant which costed 2 billions!
About the flycatcher; the brownish primaries indicate a second-year bird (male of course!), and this may explain the rather limited white primary-patches.