Nearly every morning I get woken up by the blackbirds tweet tweet tweet tweet tweet tweet tweet tweet tweet tweet, they go on and on. Now I always thought it was a territorial thing with them, they do it morning and night and in the mating season (a long one for them) they go on all day long, but this evening just as I was leaving work I saw three of them going at it on someones roof, not taking any notice of the other two next to them. So I am now thinking that they just like to make a noise because they can. Can anyone give me any clues into their behavior...........Jon