The obsession comes to the point that you start making calculations with predicted rain versus roof space (25mm x 200m2 = 5m3 or 5000L).
The tank is 2,3m high and holds almost 23.000L, making it a perfect rain gauge. One day and night of rain filled it up 70cm or 7000L. We should be good for another month or two...
Just a harmless blue tongued lizard, check out the little legs.
Why can't they come with a banner? "I come one peaceful legs"