Where are all the Willow Warblers?

18th August 2009 - overcast/showers SW2/3
Grounded Migrants
A further smattering of migrants included just 10 Willow Warbler, 2 Robin, 2 Wheatear and a Whitethroat.
Wildfowl and Waders
Waders included 6 Black-tailed Godwit and a Greenshank.
A Barn Owl was "out and about" early morning.