A classic sign of petrel activity in the mud-stone of Westland’s Punakaiki coast. Birds climbing up the steep terrain make claw-marks in the soft substrate. This bedrock also proves a slippery base for the overlying topsoil, which has slipped off in large areas in and around the Westland Petrel colonies monitored by Te Papa researchers in 2014. Image: Susan Waugh, Copyright Te Papa.Read more