RE: P51 355th FS Serial 43-12410
The nickname may have had something to do with falcons since that was the 355th FS's emblem.
See you're in France. The 355th was stationed at cricqueville France from June 18, 1944 to Aug 14, 1944 when they moved to Gael, France, then on to Orconte, France on Sept 21, 1944. There is a note that they also operated from Dizier, France from Nov 18, 1944 to Dec 1, 1944). Then on Dec 1, 1944 they moved to Rosieres-en-Haye, France. The squadron move on to Germany on April 4, 1945.
I know that's not individual plane information, but thought you might be able to find more specific information in the records/libraries/museums of the French cities the squadron was based in.