Rumpler Taube

Bird-like Taube (“dove”) monoplanes proliferated in Germany and Austria before 1914, meeting military demand for a stable two-seater reconnaissance machine.
The distinctive design was the work of Austrian engineer Dr Igo Etrich. From his first glider in 1904. Etrich evolved the unique avian silhouette with its striking sweptback wingtips. Curiously, the wing shape was modelled not on birds but on the winged seed of the Zanonia, a native vine of Java.
The first Etrich Taube was flown in 1910, later models being used by the Turks in the 1913 Balkan War. Other manufacturers produced their own versions of the design, the foremost of these being the Rumpler Flugzeugwerke of Johannisthal, Berlin. At least 66 of  the 1913 Rumpler 3  model, shown here, were bought by the German Army.
An odd feature the Rumpler version shared with most other Taubes was the external girder bracing beneath the wings, which must have caused a great deal of undesirable drag. Stable and pleasant to fly. Taubes performed useful reconnaissance work early in World War I. One German Taube even carried out the first air attack on a city, dropping five small bombs on Paris in August 1914.