I was looking for a short story I read a while ago but I think is an old scifi story (maybe from the 1960s). It's about some sort of space creature that resembles a lizard that jumps from deeper space to the Earth. The monster is big enough to sit over half the world and it seems invulnerable to any kind of attack. If I remember right, at the end of the story the creature just jumps leaving an almost destroyed planet behind.
Brian Aldiss: "Heresies Of The Huge God" © Galaxy, Aug 1966
There's some confusion as to exactly what the thing was. Some call it a lizard, others a moth, still others claim it was a machine. Aldiss was probably less than clear, deliberately, when he wrote the story.