On 4 August 2018 three Phylloscopus warblers appeared on our cruise ship in the North Sea on our way from Scotland to Amsterdam. I have provisionally identified them as Willow Warblers. I've sorted them as follows Bird A quite bright yellow with yellow color extending to the belly. Bird B is duller with browner back, yellow confined to the throat and a strong pale stripe on the side of the neck. Bird C is very dull with no yellow on the throat and only a tinge of yellow on the sides of the breast.
This is my first encounter with Willow Warblers and would like to make sure that I have them right and would also appreciate any explanation for the extreme variation in these three birds. Photos attached of A, B and C. Additional photos available if needed.
Incidentally this flock included a Sedge Warbler.
This is my first encounter with Willow Warblers and would like to make sure that I have them right and would also appreciate any explanation for the extreme variation in these three birds. Photos attached of A, B and C. Additional photos available if needed.
Incidentally this flock included a Sedge Warbler.
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