GRUNHERZ,
Actually, I don't know that that is true.
I've read several accounts,and seen 1 photo, of Mosquitoes that were set on fire and only the paint/varnish burned off of them. They were ungly as hell when they landed, but they did land.
Now, like all aircraft, fire is usually a death sign, but Mosquitoes don't seem to have been at a particularly higher risk than any other aircraft.