Fog on the Thames

I am trying to visit the site more frequently in the week, before work, as the weekends at EIDB are becoming quite disturbed. This morning there was a real pea-souper of a fog, I could barely see 10 yards in front of me. The fog started to lift at about 9.00 and was almost gone by 9.40 and I wondered what goodies it was hiding. Unfortunately it was very little, there were no spring migrants though often this site does attract an early migrant in the first half of March. The winter visitors are as expected declining, only 30 odd Teal and 22 Tufted Duck and no Redshanks, though a Kingfisher is holding on, though this does seem to be an early morning bird. Shelduck numbers are holding up with 14 still on the dock. It is possible that some of these birds may hang around to breed in the area. Passerines where thin on the ground with a female Reed Bunting the best of them.