Recently, at my home in Mar Vista, I began noticing some unusual sounds. As dusk fell and darkness drew its blanket across the sky, I’d hear intermittent hissing, cries, and croaking sounds. At times, the eerie sounds would increase with such intensity that I’d walk outside to listen. It seemed to be coming from the unlit alley behind our house. Was it some kind of Cicada? A rare type of tree frog? Frightful spirits rising up from the dead for Halloween? One night around 11 PM, I heard a bloodcurdling shriek and felt a chill go down my spine! What was going on in Mar Vista?