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Miked-I think your observation is a real canary-perhaps you could look at my observation below that no one has agreed with but which if you click on the full image and enlarge is the same species as yours I think.
taken in La Palma in October- I'm not a bird specialist but have researched this and am convinced it really is a canary and am disappointed no one has agreed !
David J Trevan
Lat/Lng: 28.41007, -16.534908333333