You've heard of Schrodinger's Cat...

Well ladies and gentlemen I present Chris's Frogs. Proof that observation of the subject infuences its behaviour. While taking pictures of the frogs i noted that the amorous male frogs were clustering around the tube where the cam entered the water. and seemed VERY interested in it. I don't know how much of a role vision plays in frog mating behaviour but i wonder whether the frogs were seeing their reflections in the tube and responding to them.