G120628A
G120628B

19h49 A.B.C.D.E.F.G.HHI. M.N.OOP.QQR.S.T.
      x C . x . C . C C  x C C C C x C x

19h51 E fly out

20h04 A.B.C.D...F.G.HHI. M.N.OOP.QQR.S.T.
      x C . x . C a C C  x C C C C x C x

20h18 Z fly in

20h19 Z.A.B.C.D...F.G.HHI. M.N.OOP.QQR.S.T.
        x C . x . C . C C  x C C C C x C x

20h23 QQ changeover
20h23 Q to T, T fly out
20h32 Z fly out

20h34 A.B.C.D...F.G.HHI. M.N.OOP.Q2R.S.Q1
      x C . x . C a C C  x C C C C x C x

20h34 X(NO) fly in
20h35 Q chick, flapping wings
20h35 X(NO) to T fly out
20h36 Q1 fly out
20h39 F chick with F
20h39 H2 fly out 
20h45 M(X) to E fight with?
      X fly in
      mass fighting on top row

20h49 A.B.C.D.XXF.G.H.I. ..N.OOP.Q2R.S.T.
      x C . x . C a C C  x C C C C x C x

      Z fly in
20h50 X fly out
20h51 STOP

• RttIoP: Common Guillemot (Uria aalge)