Experienced members of troops have honed their identification skills to impressive levels, accurately identifying species from such clues as flight formations, plumage, sounds and habitat.
他們是練就一套獨門功夫的賞鳥人，憑著鳥的飛行姿勢、出沒地帶，或者羽毛紋路、鳴聲變化，方圓數十公尺內有什麼鳥，全逃不過他們的法眼、法耳，一一被點出名來。