The first day of spring was yesterday and that's when I snapped this photo of many crows' nests, very visible since there are no leaves on the trees yet.
When I googled crows' nests, I was surprised to learn this: Crows return to the same nest territory year after year, often a few weeks before they start building. If a small group of crows remains in a particular area day after day, this may signal that nest building is about to begin. Many larger twigs that form the base of the nest are broken directly off trees."