The Eurasian Wren , is a very small bird, and the only member of the wren family Troglodytidae found in Eurasia. In Anglophone Europe, it is commonly known simply as the Wren. It was once lumped with ''Troglodytes hiemalis'' of eastern North America and ''Troglodytes pacificus'' of western North America as the Winter Wren.
It is also highly polygynous, an unusual mating system for passerines.
It occurs in Europe, a belt of Asia from northern Iran and Afghanistan across to Japan... more