I have replaced my 70-200m f2.8 with a lighter 70-200m f4 this autumn. Here are some photos of birds, shot on one of the trips for testing the lense.

Female mallard (Anas platyrhynchos).

Female mallard (Anas platyrhynchos).

Feral pigeons (Columba livia domestica)

House sparrow (Passer domesticus)

House sparrow (Passer domesticus)