Marsh Harrier (top shot) and Common Buzzard with Carrion Crow from the obs today. This is the kind of views we get of high migrating raptors some days. I am up on Tower 42 tomorrow looking for visible migration over central London with David Lindo's project. The forecast looks like overnight south winds changing to north winds by mid-day- that could be interesting! A change like that could 'catch out' migrants.