After Remus and Sirius had left for the day, Harry and Ron took off for the swimming hole. As they were nearing the water, Harry paused and called out "We're just going for a swim Sleekskin, no need to be concerned." At least, that's was what Harry heard, Ron heard his brother hissing at a snake who was resting on a log by the edge of the water. He almost wet himself when the snake raised his head and hissed back, before putting his head down and went back to sleep.