From Professor Amanda Sparkman Who is that you see out the window, scratching on the bare ground? Who is making that loud drilling sound on the roof? And who is hooting high in the tree in the middle of the day? Neighbors with Feathers is a gentle introduction to the behavior of common backyard birds in coastal California, collaboratively written by biologist Amanda Marie Sparkman with her son and fellow wildlife-watcher, Henry Sparkman Zylstra. It’s a part of the California Wild Neighbors series.