But as the weather grows hotter and the oriole fledglings begin to leave the nest and learn to fly, the resounding song with which the male birds call to their mates in the mountain valleys changes to the low, deep call that they use to declare and defend their territories.
天候漸熱，小朱鸝羽毛已豐，離巢學習飛行，山谷間公鳥頻頻呼喚伴侶的高亢鳴聲，也早已變調為低沈的守衛與領域宣示聲。