Hello Andrew
I am glad that I could be of some help. If you visit Claes Sundin's web site you may notice that he updated the Luftwaffe Fighter Aircraft page with the profile of Bf 109 F-2 "Black <<" (W.Nr. 7629) flown by Hauptmann Hans von Hahn (31 victories, RK), the Gruppenkommandeur of I./JG 3 in July 1941. On the nose you have the Tazelwurm which was the Gruppe insignia of I./JG 3 (redesignated II./JG 1 on 15 January 1942) and under the cockpit there is the rooster emblem that was his personal insignia (Hahn means rooster in German so you can see why he chose that one).
http://luftwaffeinprofile.se/vonHahn.html
Horrido!
Leo