英语听力：自然百科 鲨鱼湾的海豚—17（在线收听）

 Just how the news of the birth travel so far and how only the mums with their calves know where to come is unknown. But just the Beaches family seems to welcome Puck and Samuel. The bay's other mums seem to want to do the same. It's Samuel's first chance to meet other baby calves, but young females also are drawn to the gathering. Fascinated by new borns, these want-to-be mums often try to lure them away to play. With so many dolphins all meeting together, it's a challenge for Puck to keep track of Samuel. He's extremely sensitive to motion. It's how he knows how to follow his mum. Until he's learned his call, there's a risk that Samuel would chase any fast-moving dolphin that comes close. A mischievous young female deliberately rushes pass Samuel, knowing the new born would instinctively follow.-Another female looks being stealing.