Whenever I see a bird on a tree, I think of Wallace Stevens’ poem “Thirteen Ways of Looking at a Blackbird.” My favorite stanza’s this one:
I was of three minds,
Like a tree
In which there are three blackbirds.
Sanctus refers to the vanishing habitats of birds, among others, in the face of climate change and habitat destruction. Images are obscured, eroded, effaced, often seen only in silhouette, as though they are disappearing directly before us.