A few months back I was going down into the greenhouse, and I caught a glimpse of something moving behind my fish tank. I never saw exactly what it was , but since then I've had clues.
So Saturday night I was doing the same thing before turning out the lights, and I saw him, ..... a possum slowly crawling behind the tank. The next morning he had left me a little gift on the top of the crude device I use to get oxygen into the water.
Big Garden on the Summer Solstice.