It's a P-47 Thunderbolt, the original "razorback" version (not the later ones with the bubble canopy and cut-down rear fuselage). The instant giveaway is the V shaped windshield, which had the armour glass as a separate panel behind it (removed in the pic). The bubble canopy versions have the armour glass as the windshield itself, like most other fighters.
The German rudder/fin looks to be a piece of a the right tail boom of a Focke-Wulf FW 189.
My guess is that Bud is probably at a forward P-47 base that was an ex-Luftwaffe base (the brick wall behind suggests a large base with permanent buildings, possibly within Germany or Eastern France, in early 1945) and therefore still strewn with German wrecks. The Jug in the picture has had what looks to have been a gear up landing and was dragged away to a bone yard area, and is being cannibalized for parts as required.