Before I forget; I helped a lovely Radio 4 researcher out a while ago with an intriguing-sounding programme involving birders serving on the battlefield. You can see the original BirdGuides article here. To tell the truth I'd largely forgotten about it.
Anyway - it's on this week! You can catch it on BBC Radio 4 on Tuesday just after the 11am news. There's a wee link here. I'll pop the listen again link up once it's been on.
UPDATE: You can listen again here.