I was awake at 4am today and me and kitty looking out front window. Very dark out there. All of a sudden kitty gets very excited and a very strange cat like creature walks by the windows on sidewalk. Too dark to see details. What I did see is a rather tall cat like shape, long legs, very thin body and the strangest tail that was very long and touched the ground. I don’t know if it was a domestic cat or a wild cat. My neighbor on the upper floor of building saw a creature like that a few days ago and said it was light colored with longish fur on legs. It ran away. We are calling it Ghost cat for now. Any ideas?