Four years ago, after a particularly brutal winter and some damage from ice dams, pigeons took up residence in a section of my house’s eavestroughs. It was unpleasant, to say the least. My bed abutted the exterior wall where they were roosting, and my house is small enough that I generally heard their cooing throughout a quiet Sunday indoors. Eventually, at great expense, I had my eavestroughs redone and the pigeons were summarily evicted. Pests,…