Warbler, Siberian Willow?
Siberian Willow Warbler? 1.2.17
Siberian Willow Warbler or Chiffchaff, manically hunting on the river Cynon, going North, this is tentatively confirmed by 'Glamorgan Bird' experts, due to grey paleness and large size (present again 11.2.17). Otherwise might be an Eastern Olivaceous Warbler, Sykes’s Warbler. Because it was not calling there is no easy way to identify from some scratchy photos, its just a question of eliminating the least obvious.
Photo by James M Burton (Spooksprings) Copyright 2017.
Taken at Tirfounder Fields, Cwmbach 2017.