Today the United States observes its Memorial Day, taking a moment to remember and honor all the Nation’s servicemen who died in our wars. Begun after our Civil War, it became official after World War I.
Wars are more than human tragedies of course. They are ecological disasters. Flora and fauna suffer as well. Here, from Wikipedia, is a photo of Chateau Wood during the third battle of Ypres, commonly known as the Battle of Passchendaele, which raged from June until November of 1917.
From the looks of the trees, bird song did not accompany those Australian soldiers on their walk. Birds withstand artillery barrages no better than humans or trees.
The photographer was Frank Hurley and the photo is in the public domain.