[cd34]

its a reference to the book if I recall -- something like: one notices the birds have shadows these days. Also, when all electronic devices stopped when the tripods were around, the birds were quiet. I don't recall if this is in the 1953 movie -- I'll have to watch it in the next few days and let you know.

I also have Jeff Wayne's musical version of it which does make mention of birds -- but, its been a while since I've listened to it. I do believe there is mention again of the birds casting shadows and the fact that the birds were silent.

The book also had the birds eating the martians after they had died. I don't recall if the movie or musical referenced that.

I know in the original recording from Orson Wells broadcast made mention of it, but, its been 20+ years since I've heard it.

I don't think there is anything secretive to it -- merely an observation to make the listener/viewer aware of the little things.