LAWN SCARE!!

Help please - my lawn is being attacked.  Is this bird damage or should I be looking at some kind of treatment for the lawn,  This has happened over the past two days; the lawn is quite dry and so there is plenty of thatch for the birds to grab hold of, if bird damage is what it is,  if so why just my lawn?  Hope the photo is ok!

Sorry, don't seem to be able to provide photo - will try again.

No photo

http://www.gardenersworld.com/forum/the-potting-shed/uploading-pictures/5732.html

Sorry, don't seem to be able to provide photo - will try again.

Pinkpeony-read the link I posted

Sotongeoff -still unable to load pic.  

Christopher2  - there are straw patches over the lawn so could the birds be responsible (there are plenty of magpies and crows here)  although the extent of the damage indicates there must be hundreds of 'em!   Tufts of grass, some with soil attached have been lifted and in some places holes have been made - the lawn looks pockmarked....should I treat the lawn in some way or just rake up the mess?  

Thank you both - will keep trying with the photo.

Christopher2 &  sotongeoff - Thank you both again - I notice this morning there is another post on this subject.  Off now to the garden centre to get lawn grub killer.

Appreciate the help and advice on uploading pics via alternative method; still no luck.  My computer skills are about as good as my gardening, not sure what I'd do without advice from this forum....

Update - have dug some turf from the lawn and.... chafer grub!

Thanks again forall the advice.