On Sat, 01 Jun 2013 09:34:34 +0100, Sacha wrote:

Does anyone know why wood pigeons lie down in the grass on our lawn?
We've seen several of them do it but can't say we've noticed it
particularly before this year. It doesn't seem to matter whether the
grass has just been cut or not, nor whether it's rained or is dry.
They're alone when they do it and often remain stationary for several
minutes. We haven't noticed that the collared doves do it, only the
wood pigeons, it seems.

Not lying on ants nests, by any chance, to get themselves cleaned of
parasites?

Cheers

Dave R