Willow Warbler – Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus Willow Warbler - Phylloscopus trochilus