Wren - small birds, the sole representative of the family krapivnikovyh living in America, Eurasia and North Africa. Outwardly, he is like a soft fluffy ball with a raised stick up short tail. The bird is very mobile, with an unusually loud voice - no small males mark their territory, sitting on some hill, and displaying a variety of trills, for euphony comparable with the singing of the canary, or nightingale.
The scientific name of the type «Troglodytes troglodytes» comes from the Greek word, which literally means «dwelling in a cave». So in our time is called troglodytes - the prehistoric people who lived in caves. It seems that this name was given by a special method of bird nests - in the thick-walled spherical structure, reminiscent of the cave.
According to classical notions, the wren otosyat to sort these wren equal footing with even more of a family such as T. musculus, T. aedon and T. rufociliatus. Up until the late 1990's among ornithologists had some consensus on the systematic position of this taxon. However, in 1999, there were results of a study group by Nathan Rice of Universteta Kansas (USA), based on a comparison of mitochondrial DNA sequences of different species. For most of this kind of results have confirmed the classical scheme of an evolutionary origin, but the wren showed a more distant relationship with the rest group than previously thought. As a result, it was decided to allocate wren in a separate genus monotipichesky Nannus and treat it as Nannus troglodytes. It should be noted however, that the method used at present has not received universal approval, and the resulting genetic material is insufficient to confirm this hypothesis. Research in this direction are continuing.