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Keywords from Image Description:
The warblers of North America . Plate IX BLArKTHROATED BlUE WaRBLER AduLT MaLE Blackthroated Blue Warbler Adult Female Blackthroated Blue Warbler Young Male Cerulean Warbler Adult Male Cerulean Warbler Adult Female Cerulean Warbler Young Male onehalf natural size Plate IX Illustration biodiversitylibrary org title