Haphazardly camouflaged Messerschmitt Bf 109 G; location and exact date of photograph currently unknown to me.
The aircraft seems to be an early G-6 subtype; the camouflage on the fuselage could indicate that it was built by Messerschmitt Regensburg. It is difficult to discern if the spinner is painted entirely in RLM 70 Schwarzgrün or if it features the common white segment over one third of its surface. The lower cowling is painted in yellow.
The photo might have been taken in 1943, but then again, it actually might reflect a later stage of the war. (German Aviation 1919-1945 collection, additional thoughts regarding the identity of this aircraft very kindly supplied by Lynn Ritger)