Whilst I sit drawing in the vineyards around beautiful, historic Evora in Portugal's Alentejo region, I am constantly aware of the myriad birds flitting from one perch to another, down the ground, up into the cork oaks edging the vineyard and off somewhere else.  What impresses me is their wonderful camouflage, especially during the winter season. Unless they move, they are virtually invisible. Perhaps I have been paying their aspect closer attention than usual because I have just been reading about Lucien-Victor Guirand de Scévola, a French artist and soldier fighting the Germans during the First World War.