On Greenfinches

As green as the leaves in Summer on a tree Bird i do know but nowadays seldom does see In Winter in small flocks they search for fallen seeds on the ground Birds in large numbers never known for to abound The males than the females a far richer green Greenfinches are birds never easily seen Like their cousins goldfinches introduced from Europe in Seasons long gone The wheezy low toned song of their ancestors in today's greenfinches living on In Spring as the males fly they sing in butterfly like courtship display To seduce the female this is the male's way Every individual bird species have ways of their own And so much of Nature's ways to human kind remain unknown And greenfinches birds i do not see every day I know of but know little about in truth i can say.