gotha

I looked long at this one as it was difficult to identify. Sure is not a machine with a similarity to the Taube, the crucial wing construction is a 'normal' monoplane construction here. In the end this is not even a German machine but a Hanriot monoplane. As these machines evaluated in time, for instance the steering system evaluated from the Antoinette-system steering wheels at the fuselage side, to handles at the side of the fuselage to finally this method of steering wheel. This is most likely the last Hanriot model (year 1912) a two-seater version, with extra oil tanks. It could be deduced that this special machine was modified for a long distance or endurance competition.

I would identify this machine as a Hanriot monoplane (1912)

Hello SDASM and Kees Kort,
The photo shows the pilot Ernst Schlegel (1882-1976) on an aircraft from the famous "Automobil und Aviatik Werke Mülhausen" in 1912. At that time, Schlegel was a flight instructor in Gotha.
The aircraft is a licensed replica of a Hanriot.
Here you can find some information about Ernst Schlegel:
de.wikipedia.org/wiki/Ernst_Schlegel_(Ingenieur,_1882)

Gotha G.IX (L.V.G.) 257/18

The picture shows a Gotha WD-2 in Ottoman Naval Service colors before delivery, that is still at the factory of Gotha. As the factory of Gotha [a division of the Gothaer Waggonfabrik] had no access to water in the neighborhood, they built their own water basin to test the floats. On this factory shot can be seen the first of the three machines delivered to the Ottoman Navy air service, hence the Arabic numeral "1" at the side of the fuselage.