ML620074418

觀察細節

Two winged warblers in seeming duet, one singing "Bee bzz bzz bzz" the other "Bee BZZZ". "Bee BZZ" bird had pure blue-wing features: Yellow below with white undertail coverts, gray-blue wing with two thin white wingbars. Black eyeline, no black on throat. Photo/Audio. I was unable to locate second bird and will list as such.